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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.

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: B
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.

New input: Article: People who put a smiley face at the end of a message, in an attempt to show feeling, show no feeling. I wish there was a symbol for two fingers in the air. I had some bad news this week. My manager informed me of this news via email. It was like hearing about the death of a loved one via pigeon. Bad news should only ever be delivered face to face or voice to voice. We seem to celebrate our numerous methods of communication, but really there is no communication at all. I talk to my plants more than I talk to my neighbors, I get text messages that take me three hours to read because they're written like this: "Hi, I ope you av a gr8 day. Call me La8tr." I had an email from someone this week that read, "Da ut ov 2day are really annoying me!" Ut? I had to say this 20 times before I understood it. Youth has now become ut. Haven't we taken enough from them--now we have to take their letters? I had an email recently from a girl who used to live over the road from me as a child. She wrote, "Hi Shazia, howz u? Im sure u used 2 live across the road from me. We sumtimes played tennis 2 gever at the park and you was in your eliment. I am married now wif 3 daughters." Then, to my horror, she ended the email with: "Im now teachin in Leeds. Luv Clare." Teaching? With English like this. It's like saying you're a train driver when you've never seen a train. It was like reading modern Morse code. Getting bad news via email makes it seem so much worse than it actually is. Just a few lines, no emotion, no comfort, not really an explanation. Just a few cold hard words. It's an excuse. Just write a few words and the problem of delivering it is no longer yours. A close friend recently told me she was very happy to announce she was getting married--and made the announcement by email. I don't know how she didn't fall off her chair with excitement while writing it. If you are really happy or really sad to announce something important, wouldn't you like a human reaction? Some euphoria, elation, tears, a punch in the face? I receive long text messages every day with information and explanations that I don't bother reading. They're boring, and annoy me. In the time it took someone to write me three laborious texts, they could have called, spoken to me, made some tea. People who put a smiley face at the end of a sentence, in an attempt to show feeling, show no feeling. I wish there was a symbol for two fingers in the air, because that's the one I'd send back. The telegram has been responsible for reporting world-shattering events when there were very few other options . Now we have options, and people opt for the least humane one. My mum, in an attempt to get down with the ut of today, asked me to teach her to text. Now she constantly texts me in block capitals, so it looks as if she is still angry and annoyed with me after all these years. People don't even write by hand any more. My doctor prints out prescriptions from his computer; even my mechanic prints out a receipt. I get typed Christmas cards and my friends send me emails. I get very excited when hand-written letters come through my door, only because they rarely do. When I was at school, the girls used to write letters to each other, even though we sat side by side and spoke to one another all day. I think it was a way of expressing private things we were afraid to say when we were 14 and too shy. We used to write things like, "You are my best friend, can't wait to sit next to you in math." I miss the personal method of communication. Once the pen was mightier than the sword, now it seems the keyboard is mightier than the pen.
Question: According to the writer, which of the following can support her opinion?
Options: (A) She has been separated from all his classmates many years. (B) No doctors write prescriptions by hand because of computers. (C) In communication, we should write more letters than send messages. (D) Less shy than school girls, boys rarely write letters to their friends.
Solution:
C