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: There are millions of used cell phones in the world today. Most of them just lay in our houses without any purpose. Every day dozens of new cell phone models appear. Today, you can find what was regarded as a fantasy yesterday in store and you will buy it tomorrow. But what to do with the old phones, which work well enough and not so old?     Just get some money! Simply Sellular is buying almost all models of cell phones: LG, Motorola, Siemens, Samsung, Sanyo, Nokia and many other cell phones. Also they accept phones produced in every country, and in every condition. Simply Sellular can offer a good price for your old cell phone in cash. Their mission is giving you a simple way to get money for an old phone, as simple and profitable, as possible. Also they offer a trade-in scheme  to get another model instead of your phone, providing a good service after the sale.     Also Simply Sellular works with the so-called 911 cell phone program. So you can donate  your cell phone to them to help some people who need it. They know what to do with your old phone ! You can be interested in their recycling programs, where every used cell phone could be easily recycled for a few times.Simply Sellular donates some phones, which are good for refurbish  , to people who need it, for example women or military personnel. If the refurbish is impossible they just recycle cell phones.      Just think a minute: it's a good deal to get some money for your old cell phone, a good deal to help somebody with your phone and really important to recycle all techniques after use. Working with Simply Sellular you get every possibility  ly free. And they will pay you! That's a really good deal! 
 Question: When you want a new cell phone, you are advised to    _  . 
 Options: (A) keep the old one in house (B) throw the old one into the dustbin to protect your health (C) return the old one to the producer to get some money (D) sell the old one to Simply Selluar on a reasonable price
D

Article: Have you ever heard the saying " _ "? Here is how a new teacher made friends with the girls and boys in her class on the first day of school. As the bell rang, the teacher smiled at each girl and boy. Then she said in a quiet voice, "Good morning. How nice it is to have all of you in my class this year. I'd like to know each of you. I am sure we will enjoy working together." Everyone felt that she meant what she said because of her sweet voice and her friendly look. She told the girls and boys her name and wrote it on the blackboard. Then she told them some of the things she liked to do and she was hoping to do with them during the year. Then she said to the class, "Now you know my name and the things I like and I want to know your names and the things you like. Then I will feel that I know you." Could you make friends by doing the same as this teacher did? One way of getting to know girls and boys in your class is to find out more about them. It is often easy to be friends with those people who have the same hobbies with you. You play the same games and go on journeys together. You may find that some new comers in your class miss their old friends and feel strange and lonely. You can invite them to take a walk or to ride bikes with you. You will find many things in common to talk about. Just talking together in a friendly manner is one good way to make friends. 
 Question: The teacher's sweet voice and her friendly look   _  . 
 Options: (A) made every girl and boy happy (B) told the girls and boys everything about herself (C) showed that she would like to be a friend of the girls and boys' (D) meant she wanted to tell the boys and girls something interesting

C

