Given the task definition, example input & output, solve the new input case.
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
Output: B
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 case for you: Article: This week was busier than usual, and I was very tired today. All I wanted to do was to go home and enjoy a bowl of good hot soup. But when I saw my daughter's car, _ Since his parents separated, I had tried to have my six-year-old grandson spend a few hours with me at least once a week. I had always tried to make it a special time for him. We did many interesting things; Bryan loved all these activities, and so did I. But today I had to give up our evening. I said how tired I was feeling. "Bryan, I'm sorry. Tonight I don't feel like having fun or playing games. We'll have our night together some other time." I saw the sadness in Bryan's eyes. He said, "I like soup, Grandma." I knew he meant "Please don't send me away. Please let me stay." I saw the shadow in Bryan's eyes. Something else was changing. Maybe he thought I wouldn't want to have him come any more -- not tonight, not next week, not ever. Finally, I said OK. I was glad to see his eyes light up. After I put the soup on the stove and turned on the TV, I fell asleep. When I woke up, there was a coat over my legs, and the soup was gone. Bryan was on the floor, reading a coloring book and watching a television show at the same time. The poor boy must have been so bored ! When he found I was awake, he ran over and gave me a big hug. "I love you, Grandma," he said. "Haven't we had a nice time together?" His big smile and happy eyes told me that this time he meant exactly what he was saying. That was the keyword -- together. We had done nothing exciting or special. But we were together.
Question: Why didn't the author want to stay with her grandson that night at first?
Options: (A) She was too tired to have fun or play games with him. (B) She was sick and wanted to have a good rest. (C) She was too busy and had to work overtime that night. (D) She had to prepare soup for the whole family.
Output:
A