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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: I met my step-mom for the first time when I moved to America to be reunited with my father. From the beginning she made sure to let me know that I was safe and welcome. I remember when I first saw her at the airport. It was different but not uncomfortable. After I was picked up from the airport we went home and she unpacked my luggage. Then she took me shopping for new clothes since the ones I had brought with me from Africa were a bit worn. That night before I went to bed she came to my room, which was the first room I had ever had for my own, with the first bed I didn't have to share. She told me she was glad to have me and that she would take good care of me. Before she walked out of my new room, she asked me for a hug. I had no idea what she was talking about. I did not know what the word hug meant, not because I didn't speak English, but I had just never heard the word before, let alone knew what it meant. So, I just looked at her with a questioning expression on my face. But she didn't give up. She called my father into the room and asked him to explain to me what she meant. When my father was explaining I looked at her and wondered why she wanted to hug me. She then told me it was because she loved me and opened her arms wide. Shyly I opened mine and we hugged. That was my very first hug and I was 11 at that time. I'm 23 now and, thankfully, I have received many hugs since then. I consider her my birth mother because life began when I came to stay with her. For the first time there were no kids for me to take care of and I became a child for the first time. There was no work waiting for me every day other than the occasional chores that she gave me to teach me responsibility. Today I say thank-you to my mother; thank you for giving me my childhood back after it had been taken away from me. I am who I am today because of your love!
Question: What was the author's life in Africa?
Options: (A) Difficult. (B) Amusing. (C) Challenging. (D) Satisfactory.
Solution:
A