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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: 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: B
Why? 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.

New input: Article: Surviving the boredom of a school day can be bad enough, but when you have to worry about school gangs as well it's enough to make any student want to stay at home and under the covers! Unfortunately, gang culture can be found in many British schools, and it brings with it negative, and dangerous, side effects. The presence of weapons at or near school, the appearance of graffiti on buildings and lockers, and pressure to blow off school work and exams all follow where the gangs lead. None of these things contribute to a good education, but for school gangs that's exactly the point - school is for being popular and having fun, not learning anything or preparing for the future. Keep these tips in mind and say goodbye to school gangs. Know your own mind. Often it is those with low self-esteem and a poor self-image who become victims of school gangs. These students don't know their own mind or have a clear picture of what they would like to do in the future, so it is easy to be influenced by those who don't want to do any work today. Keep yourself busy. School gangs often hang around at or near schools with no real reason. Students who have nothing scheduled can easily be sucked into these groups, but if you are busy, busy, busy and always on the move there will be less chance that you'll have the time to stay and "play". Choose your friends wisely. With a core group of like-minded friends, it is much easier to stay away from school gangs because you simply don't need them. Remember that gangs are a source of power for members, but they can also be a source of intimidation. Work hard and have fun. No one likes a teacher's pet, but school gangs in particular hate them. Work hard and have fun at school, but don't annoy anyone with extreme goody-two-shoes behaviour. School gangs can be a nightmare if you must deal with them constantly. Stay away from gang hangouts and gang members, and don't involve yourself in any gang related activities.
Question: For the school gangs, school is _ .
Options: (A) where they are instructed to behave themselves (B) a good place to prepare for the future (C) where they win popularity and enjoy themselves (D) a place that contributes to a good education
Solution:
C