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: "REMOVE from friends." This is no ordinary button. One click and I have the power to erase a person from my life. In late fall, I had around 400 friends on Facebook. Today, I have 134. Click. Make that 133. When Facebook first entered my life in 2005, I panicked(, ) that my friend count was too low. If I wasn't properly connected, how would anyone see my clever quote ? Who would wish me a happy birthday? I accepted and sent out friend requests without a second thought and soon accumulated 391 friends. There is an appeal to being able to communicate with someone or just "thumbs  up" a photo rather than make real conversation. "It's comforting and it's easy," said Larry Rosen, a psychology professor at California State University, who studies the way people communicate online." There's a sense of belonging in it. It's a sense of community in a generation where community has sort of  disappeared." However, I don't talk to half of these people in the online community. There are some I would avoid if I met them on the street. Click. 132. I decided to rid my account of any "friend" that...well, wasn't. Sound easy? You try it. Look at who you're dealing with: family, friends, classmates, crushes , acquaintances... With every click of the "Remove from friends" button, you risk burning a bridge, losing a contact and missing an opportunity. So every time I go to click the button, my heart hurts. However, I'm not the only one who has experienced a Faceboook friend refreshing. The New Oxford American Dictionary announces its "Word of the Year" each year, and last year, "unfriend" made the cut   (though I'll still stick with "defriend"). When I started my mission , _ . Most were surprised by how easily they could cut hundreds of connections without thinking twice. "Oh my God, I defriended like 600 people today. I feel so good!" my friend Sarah messaged. Dana, a close friend from high school, and I battled it out to see who could get our counts lower. She wins at 123. To some, it's poor "netiquette " to defriend. But to me, it's the stage of life when we hold onto the people who count, the people who impact you. 
 Question: According to the article, what happens when you click the "Remove form friends" button? 
 Options: (A) A message is sent out to your online friends. (B) You accept someone as your online friend. (C) You send out a friend request to people. (D) The number of your online friends is reduced.
Solution:
D