Given the task definition, example input & output, solve the new input case.
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.
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
Output: B
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 case for you: Article: Cyril was a small town. The houses there were all made of wood; almost everything in the houses such as cupboards, tables and chairs were made of wood, too. And all the houses faced south. The town was never peaceful. Fire broke out once a week on summer afternoons. Residents were puzzled who the real firebug was. One day a big fire broke out. It was said that a Negro had jumped out of the house on fire, so the police arrested all the Negroes in the street. However, fire never stopped to breaking out when the Negroes were in prison. Mauson, a physics teacher didn't believe that the Negroes were the firebugs, for he really knew about those Negroes, He made up his mind to find out who the real firebug was. One day he was invited to drink in a pub and happened to notice that many bottles and plastic plates were baked by the hot sunrays. Suddenly he realized what the actual fact was. He jumped with joy, saying, "I've got the answer!" Mauson dashed out of the pub to his friend's house nearby, which also faced south. He made an experiment there to confirm his idea. The next Saturday afternoon, Mauson asked some policemen and newsmen to come to the house. They were told that the real firebug would be shown there. At that time the sun was shining full into the house and it became hotter and hotter inside the room. Someone wanted to draw the curtains together, while another was going to use a bottle to drink water, but neither got permission from Mauson, who wanted to let the firebug in. "Now," said Mauson, "this house will soon catch fire." People looked at each other in surprise. Mauson asked them to look at the bottles and focus on the table cloth. After a while the cloth gave off a burning smell and began to catch fire! The mystery of fire was discovered, but the police wouldn't believe him and insisted that Negroes had been the firebugs. Instead they arrested Mauson and put him into prison. But Mauson said he would never turn against science.
Question: The town was never peaceful, for fire broke out _ .
Options: (A) in the afternoon (B) in summer (C) at any time (D) A and B
Output:
D