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.
One 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
Solution is here: B
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.

Now, solve this: Article: Inside the pleasingly fragrant cafe, So All May Eat(SAME) in downtown Denver ,the spirit of generosity is instantly noticeable :A donation box stands in place of a cash register. Customers here pay only what they can afford, no questions asked. A risky business plan, perhaps, but SAME Cafe has done one unchangeable thing in the Mile High City for six years: Open only at midday, the restaurant provides poor local can instead volunteer as waiters and waitresses, and dishwashers, or took after the buildings and equipment for the cafe. "It's based on trust, and it's working all right" , says co-owner Brad Birky , who started the cafe in 2006. With his wife Libby. Previously volunteering at soup kitchens, the Birkys were dissatisfied with the often unhealthy meals they served there. "We wanted to offer quality food in a restaurant where everyone felt comfortable ,regardless of their circumstances," Birky says. SAME's special lunch menu changes daily and most food materials are natural and grown by local farmers. The cafe now averages 65 to 70 customers (and eight volunteers) a day. And the spirit of generosity behind the project appears to be spreading. In early 2007,one volunteer who had cleared snow for his meals during the long winter said goodbye to the Birkys," He said he was going to New Orleans to help with the hurricane clear up," says Birky. 68.What can we learn about the soup kitchens the Birkys previously worked for? 
 Question: What can we learn about the soup kitchens the Birkys prcviously worked for? 
 Options: (A) .       They refused to have volunteers. (B) They offered low quality food. (C) They provided customers with a good environment. (D) They closed down because of poor management.
Solution:
B