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
Example solution: B
Example 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.

Problem: Article: As the world watched the twin towers of the World Trade Center come under attack, a common phrase was repeated:" It looks like a movie." But this time there was no superman to save the people or the famous building. The attack destroyed one of the world's highest skyscrapers and left 5,000 people dead or missing. Movie fans have become used to such events after years of Hollywood films showing disasters, terrorism and danger. The Empire State Building, the White House, New York City and even the American president himself have all been threatened by terrorist attacks in these exciting films. The film" True Lies", released in 1994, is considered to be a good example of this kind of movie. The special effects, including explosions and missiles, make the action look like a real thing. "Independence Day" in 1996 took this type of movie one step further by blowing up the White House. This science fiction movie is about a war between human beings and aliens from another planet. In the movie, the World Trade Center towers are destroyed. Violence has become a major part of Hollywood movies. And this is what people enjoy. Soon after the attacks, many famous film companies stopped the planned releases of some of their new movies, especially if their films showed terrorist attacks or plane crashes. "Swordfish" was top of the American box office in June. But the movie's story was frighteningly similar to the Sept. 11 disaster. The film would have been stopped in American and British cinemas after the attack. But it's unlikely that Hollywood will stay quiet for long. It is already waiting for the feeling in America to calm down.
Question: What is the main subject of the newspaper article?
Options: (A) The relationship between the Sept. 11 attack and Hollywood films. (B) The effect of the Sept. 11 attack and Hollywood films. (C) The response Hollywood made to the Sept. 11 attack. (D) The result of Hollywood films showing violence and disasters.
Solution: B