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: Having spent five years searching for her older brother, Miss Lund was unbelievable to think she had been working in the same building for five months.          Mr.Philips, 33, and Miss Lund last saw each other almost twenty years ago after their father, also called Stephen, 56, lost contact with his son from a previous relationship.Miss Lund, only five at that time, moved to India with her father and mother Rose, while Steven lived with his mother in Wolverhapton.     By the time Miss Lund and her parents returned to Leeds, the family had lost all contact with Mr.Philips.On turning 18, Lund started to track down her long-lost half brother, even asking customers at the shop where she worked.But despite checking on Internet sites such as Friends Reunited and MySpace, it wasn't until the pair started working together at Loop Customer Management where she went on asking everyone if they knew a Stephen Philips that she tracked him down in March, 2007.     She couldn't believe it when she was told someone by that name worked there.After she checked on the Internet database, it suggested he wasn't her brother as his name Steven instead of Stephen.Then a friend came up to her and said Steven's surely her brother.They checked parents' names and it turned out they were related.She wanted to scream but they were at work so they just hugged and chatted.     Mr.Philips, a father of four children, said he was delighted, adding: "I never thought we would meet again.I can't wait to get to know my sister.We have so much to know." 
 Question: The relationship between the brother and sister is that  _  . 
 Options: (A) they have the same father (B) they have the same mother (C) they have the same parents (D) they are just cousins
Solution:
A