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: With my hands and knees on the floor of the airplane, I was searching for an old lady's missing hearing aid during the flight from Sydney to Los Angeles. It occurred to me that this may not be the most dignified posture for a Buddhist nun . I had seen the old lady from the seat in front of me as she walked up and down the passage with a flashlight. I asked a few times what was wrong, but she didn't answer at first --- she couldn't hear me. She was wearing a woolen coat. Judging from her accent, she came from Eastern Europe. Do you know what hearing aids cost? Thousands, especially for the new tiny hidden-in-the-ear type she described. It takes a long time for an appointment to make a new one, and many doctor visits to get the thing adjusted right. Therefore, my dignity seemed less important than finding that hearing aid. But how does one find a tiny black object in a shadowy jet cabin ? The lady wasn't even sure where or when she had lost it. At one point, a couple of flight attendants did a random search around the lady's seat; I wasn't impressed. They left suggesting that she search the seat of her previous flight! My flashlight turned up all kinds of small objects, bits of plastic, broken pieces of headphones. The old lady said that she gave up. Yet I couldn't. After we landed, as passengers streamed past us, I insisted that the lady move aside while awaiting her wheelchair. Then I got into a real down and dirty search among the dust under her seat and on the floor. Look! A little peanut-sized shiny black object caught the light of my flashlight in a floor crack near her seat. What a rush. "I found it!" With great astonishment and gratitude, the old lady responded, "I haven't the words to express my thanks!"
Question: Why did the author put her hands and knees on the floor?
Options: (A) She is a religious Buddhist nun. (B) She fell down from her seat. (C) She helped the old lady look for her hearing aid. (D) She wanted to stand out among the passengers.
Solution:
C