In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Article: Sensing phantom phone vibrations  is a strangely common experience. Around 80% of us have imagined a phone vibrating in our pockets when it's actually completely still. Almost 30% of us have also heard non-existent ringing. Are these signs of madness caused by digital culture? Not at all. In fact, phantom vibrations and ringing indicate a fundamental principle in psychology. Psychologists use a concept called Signal Detection Theory to guide their thinking about the problem of perceptual  judgments. Working through the example of phone vibrations, we can see how this theory explains why they are a common and unavoidable part of healthy mental function. When your phone is in your pocket, the world is in one of two possible states: the phone is either ringing or not. You also have two possible states of mind: the judgment that the phone is ringing, or the judgment that it isn't. Obviously you'd like to match these states in the correct way. True vibrations should go with "it's ringing", and no vibrations should go with "it's not ringing". Signal detection theory calls these faithful matches a "hit" and a "correct rejection" But there are two other possible combinations: you could mismatch true vibrations with "it's not ringing" (a "miss"); or mismatch the absence of vibrations with "it's ringing" (a "false alarm"). This second kind of mismatch is what's going on when you imagine a phantom phone vibration. What does that mean in terms of your phone? We can assume that people like to notice when their phone is ringing, and that most people hate missing a call. This means their perceptual systems have adjusted their bias  to a level that makes misses unlikely. The unavoidable cost is a raised likelihood of false alarms of phantom phone vibrations. The trade-off between false alarms and misses also explains why we all have to put up with fire alarms going off when there isn't a fire. It isn't that the alarms are badly designed, but rather that they are very sensible to smoke and heat and biased to avoid missing a real fire at all costs. The outcome is a rise in the number of false alarms. These are inconvenient, but nowhere near as inconvenient as burning to death in your bed or office. The alarms are designed to err on the side of caution. 
 Question: The writer tries to explain phantom phone vibrations_. 
 Options: (A) by analyzing some facts (B) by giving some examples (C) from the angle of biology (D) from the angle of psychology
D

Article: A new concept vehicle, Pod was introduced by Toyota and Sony at the Tokyo motor show. The car is intended as a four-wheeled friend. It aims to provide affection, sympathy and encouragement. Like a dog welcoming its master, the car sits up, wags its tail and acknowledges its owner's presence using hydraulics  and a multi-coloured LED display panel  across the front. While on the road, the car constantly monitors the driver's mood with pulse and sweat  sensors on the joystick . Cameras focused on the eyes keep watch for any sigh of _ . If a driver appears to be losing his or her cool, Pod will display warnings, play soft music and blow cold air at the face. Drivers are shaken awake with loud music and a shaking chair. To improve driving skills, Pod uses a comparison to score drivers, offer advice and rank all Pod owners. Toyota claims that the car will eventually be able to learn its owner's likes and dislikes by monitoring passenger conversations. If the car hears a favorite song being discussed, it will download the track from the Internet and play it without being asked. It will also recommend  restaurants that might suit the driver's taste and take photographs of passengers when they sound particularly happy. In keeping with the moodiness that is the car's main selling point, Pod expresses a form of road anger. If a driver brakes or swerves  suddenly, the LED panel shows an angry red and the tail rises at the back. Anger is one of the car's ten "emotional states". Another is sadness --- a blue front with tear-shaped lights seemingly dropping from headlights --- which appears after a flat tire or when gas is low. "We wanted to show that the cars can be cheerful and entertaining," said Yasunori Sakamoto, part of the Toyota design team. Mr Sakamoto said Toyota has no plans to put Pod on the market. Sad, really. 
 Question: According to the text, Pod can   _  . 
 Options: (A) rank the restaurant nearby (B) recommend a song to passenger (C) have a conversation with drivers (D) test the driver's driving skills
D

Article: As early as the mid-18th century, some people began raising doubts about Marco Polo's travels. In1995, historian Frances Wood argued in her bookDid Marco Polo Go to China? that the famous explorer from Venice never made it to pass the Black Sea. She noted that his travel journal left out the Great Wall of China,chopsticks and tea drinking among other details.Furthermore, Chinese documents from Polo's day made no mention of the explorer and his men. Wood and other scholars have argued that Marco Polo based his tales of China on information collected from fellow trades who had actually been there. Last year, a team of Italian researchers became the latest to challenge Polo's accounts . They said that evidence didn't support his description of Kublai Khan's Japanese invasions  . Now, however, research by Hans Ulrich Vogel of Germany's Tubingen University might help prove Marco Polo was true. In a new bookMarco Polo Was in China,the professor of Chinese history tries to prove that Marco Polo spoke the truth. He suggests, for example, that Polo didn't include the Great Wall in his book because it only achieved its great importance in the Ming Dynasty several hundred years later. Vogel further explains that Chinese records from the 13th and 14th centuries avoided setting down visits from Westerners. Historians before him have touched on these issues. But Vogel also relies on another evidence:the explorer's very detailed descriptions of currency and salt production in the Yuan Dynasty. According to Vogel, Polo documented these aspects of Mongol Chinese culture in greater detail than any other of his time. This is a hint   that Polo relied on his own powers of observation. Will we ever know whether Marco Polo traveled to China? Perhaps not, but the consequences ofhis real or fictional journey are still felt across the globe. One reader ofThe Travels of Marco Polowas Christopher Columbus, who stepped upon the New World while following his idol's footsteps. 
 Question: France Wood doubted Marco Polo's travel's to China because his description  _  . 
 Options: (A) missed some important culture of China (B) covered so much about traders' life (C) was full of obvious mistakes (D) seemed less detailed

A

