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.
One example: Article: Homework can put you in a bad mood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay. 
 Question: Researchers did experiments on kids in order to find out _ . 
 Options: (A) how they really feel when they are learning (B) whether mood affects their learning ability (C) what methods are easy for kids to learn (D) the relationship between sadness and happiness
Solution is here: B
Explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment. So, B is the correct answer.

Now, solve this: Article: It's not often you get information about a destination from a heavy metal band, but in Debrecen, Hungary's second largest city, locals are used to having to make a noise to get heard. Just off the historic center, Roncs bar is a pub that also hosts live music.  It has the atmosphere of a student party in an old building that might soon be knocked down. Roncs is owned by Hungary's best-known heavy metal rock band, Tankcsapda. Sometimes referred to as the "Hungarian Metallica", the band has taken a type of music that is famous worldwide and-through lyrics, album covers, and an annual New Year's party and concert-made it all about their home city. It's perhaps fitting that Tankcsapda should be seen as ambassadors for Debrecen-the city sometimes needs loud heavy metal rock music to get noticed. "Foreigners think that Hungary is Budapest and there's nothing else," is a familiar saying on Debrecen's[:streets. Debrecen has, at times, been more important than the current seat of power, with locals claiming it takes over in times of trouble. That doesn't quite add up. Debrecen survived an attack from the Mongols in the 13th century, the Black Death, 150 years of struggle against the Ottomans and numerous conflicts, and yet it[:has still only briefly been the country's capital twice. This happened for the first time after a short-lived revolution in 1849, and for a second time at the end of World War II. Today, Debrecen may not be well known to tourists, but that only adds to the charm of this relaxed city. It's a small place; the historical center is sized for strolling   and regular cafe stops. There's also a view of Debrecen's mix of architectural styles, a result of the frequent large fires that back in the 19th century led the city's students to form one of Europe's first-ever fire brigades  . You can also see traditional _ from the rooftops, featuring Islamic star and crescent moon symbols that once advertised to Ottoman invaders that the city preferred trading to fighting. Trade meant that Debrecen's skilled people became very successful and the city became famous for-among other things-fine foods, hats and clay pipes. In the early 19th century, 10 million clay pipes were reportedly made a year, with thousands bought for Britain's navy. 
 Question: What do Debrecen citizens expect Tankcsapda to do? 
 Options: (A) Introduce heavy metal music to Hungary. (B) Hold parties featuring live heavy metal music shows. (C) Try to make Debrecen known with its music. (D) Create a unique type of heavy metal music.
Solution:
C