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.

Let me give you an 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
The answer to this example can be: B
Here is 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.

OK. solve this:
Article: Different colours can affect us in many different ways, according to Verity Allen. In her new series ' Colour me Healthy', Verity looks at the ways that colours can influence how hard we work and the choices we make. They can even change our emotions and influence how healthy we are. "Have you ever noticed how people always use the same colours for the same things ?" says Verity. " Our toothpaste is always white or blue or maybe red. It's never green. For some reason we consider green products as being a bit unacceptable. It's the same for businesses. We respect a company writing its name in blue or black, but we don't respect one that uses pink or orange. People designing new products can use these ideas to influence what we buy." During the four-part series, Verity studies eight different colours, two colours in each programme. She meets people who work in all aspects of the colour industry, from people designing food packets , to people naming the colours of lipsticks . Some of the people she meets clearly have very little scientific knowledge to support their ideas, such as the American " Colour Doctor" who believes that serious diseases can be treated by the use of coloured lights. However, she also interviews real scientists who are studying the effects of green and red lights on mice, with some surprising results. In a word, it's an interesting show, and anyone who watches it will probably find out something new. But because Verity goes out of her way to be polite to everyone she meets on the series, it's up to the viewers to make their own decisions about how much they should believe.
Question: The main purpose of the text is to provide information about _ .
Options: (A) a television host (B) a new television series (C) how colours influence us (D) the popularity of a recent television show
Answer:
B