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: Dear Miss Manners, Friends of mine lost their home in a house fire.It was terrible.Another friend set up a "go fund me" type page for friends and funnily to donate and help the couple.Many friends, including me, helped with money, meals, lamprey and their dog while 'they were getting back on their feet. Last week, they sent thank-you notes.My roommate received one addressed to her and I did not The notes were not in modularized; it was a printed one-size-fits-all message.My roommate realized I didn't receive a thank you, so she sent a private message to the couple just letting them know I had been left out.I didn't know she had done this until later. The next day, I got a text message apologizing and saying that I had been left out because their friend who addressed the notes must have missed me!(Miss Manners, they didn't even address the notes themselves!)It was accompanied by a picture of the thank-you note, which was texted to me with- the message, "Here is a thank you just for you. " I was a little annoyed.I helped them in their fume of need and didn't get a second thought.I have not responded to her text message.Is it fair of me to consider this friendship over? Should I tell her that I am upset, or should I accept that this rude thank you was better than nothing?
Question: For what purpose did Mary write the letter?
Options: (A) To start a public donation for the unlucky couple. (B) To teach us how to see the true colors of friendship. (C) To tell us to loam a lesson from her story (D) To ask for advice on how to deal with her annoyance.
Solution: D