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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: The phenomenon is becoming more and more popular that human beings have developed a closely relationship with the most dangerous of animals-Kevin Richardson treats lions like kitty cats,Andre Hartman has a special bond with Great White Sharks and now there is 79year old Werner Freund who has spent the last 40 years of his life in the company of wolves. While details about how and why the former paratrooper became attached to these beautiful wild animals are a little summary,he has been tending them in his 25acre Wolvespark located in the German province of Saarland,since 1972.While he currently has a group of 29,over the years he has raised almost 70 wolves belonging to all breeds ranging from Siberian to Arctic,Canadian,European and even,Mongolian.The wolves treat Werner as if he were one of their own.They nuzzle against him,play with him and are generally sheeplike when he is around,just like they would be around a head wolf! This,however,is not accidental-It is a position that Werner works on establishing and maintaining with a simple act,every single day-Whenever it's feeding time,he calls his wolves to come for the raw meat by howling.As the hungry animals rush to get their food,they are always met with this scene-Werner sinking his teeth into the raw meat first.While this may sound a little rude,that is how the position of hierarchy is established in the animal world.It is always the leader male that gets the first meal and only when he signals,can the rest join in.Werner's wolves know this rule quite well and never challenge his authority. While wolves,the largest member of the dog family,are believed to be dangerous,they rarely attack humans.Werner says that in reality,they are beautiful gentle souls,whose reputation has been tarnished,by fairy tales like Red Riding Hood!
Question: What's the best title of the passage?
Options: (A) Human beings can get along well with animals (B) Werner Freund and his famous Wolvespark (C) Werner Freund treats his wolves like friends (D) Exparatrooper shares special bond with wolves
Solution:
A