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 Input: Article: He was driving home one evening, on a country road. Work, in this small community, was as slow as his broken Pontiac. But he never quit looking. Since the factory closed, he'd been unemployed. And with winter approaching, the cold days had finally hit home. It was a lonely road. Very few people had a reason to be on it, unless they were leaving. Most of his friends had left. But he stayed on. After all, he had his root here. It was getting dark, and snow was coming down. He'd better get a move on. Suddenly he saw an old lady on the roadside and obviously needed help. So he pulled up in front of her Mercedes and got out. She was worried. No one had stopped to help for the last hour or so. Was he going to hurt her? He looked poor, hungry, and ... dangerous. He could see that she was frightened, standing out there in the cold. He said, "I'm here to help you, Ma'am. Why don't you wait in the car where it's warm? By the way, my name is Joe." The car had a flat tire. Joe crawled under the car and soon he was able to change the tire. But he had to get dirty and his hands hurt. As he was turning the screws ,she rolled down her window and began talking to him and said she couldn't thank him enough for coming to her aid. She asked him how much she owed him. Any amount would have been alright with her. She had already imagined all the terrible things that could have happened had he not stopped. Joe never thought twice about the money. This was simply helping someone in need, and God knows there were plenty who had lent him a hand before. He had lived his whole life that way, and it never occurred to him to act any other way. He told her that if she really wanted to pay him back, the next time she saw someone who needed help, she could give that person the assistance they needed, and Joe added "... and think of me." A few miles down the road the lady saw a small cafe. She went in to grab a bite to eat, and take the chill off. It was a dirty-looking restaurant. Outside were two old gas pumps. The whole scene was unfamiliar to her. The waitress came over and brought a clean towel to wipe her wet hair. She had a sweet smile, one that even being on her feet for the whole day couldn't erase. The lady noticed that the waitress was nearly eight months pregnant, but she never let the strain and aches change her attitude. The old lady wondered how someone who had so little could be so giving to a stranger. Then she remembered Joe. After the lady finished her meal, she handed the waitress a $100 bill. When the waitress came back with the change, she found the lady was gone and something written on a napkin. Reading the note, there were tears in her eyes. It said, "You owe me nothing. I've been there too. Someone once helped me out, like I'm helping you. If you really want to pay me back, don't let the chain of love end with you. That night when she got home from work, she was thinking about the money and what the lady had written. With the baby due soon, life would be harder. She knew how worried her husband was, and as he lay sleeping next to her, she gave him a soft kiss and whispered soft, "Everything's gonna be alright; I love you, Joe."
Question: The old lady left the change, mainly wishing to _ .
Options: (A) impress the waitress with her generosity (B) show pity to the woman expecting a baby (C) bring love forward by helping those in need (D) express thanks for the waitress' quality service
Example Output: C

Example Input: Article: Humans and many other mammals have unusually efficient internal temperature regulating systems that automatically maintain stable core body temperatures in cold winters and warm summers. In addition, people have developed cultural patterns and technologies that help them adjust to extremes of temperature and humidity . In very cold climates, there is a constant danger of developing hypothermia , which is a life threatening drop in core body temperature to below normal levels. The normal temperature for humans is about 37.0degC. However, differences in persons and even the time of day can cause it to be as much as 6degC higher or lower in healthy individuals. It is also normal for core body temperature to be lower in elderly people. Hypothermia begins to occur when the core body temperature drops to 34.4degC. Below 29.4degC, the body cools more rapidly because its natural temperature regulating system usually fails. The rapid decline in core body temperature is likely to result in death. However, there have been rare cases in which people have been saved after their temperatures had dropped to 13.9-15.6degC. This happened in 1999 to a Swedish woman who was trapped under an ice sheet in freezing water for 80 minutes. She was found unconscious, not breathing, and her heart had stopped beating, yet she was eventually saved despite the fact that her temperature had dropped to 13.7degC. In extremely hot climates or as a result of uncontrollable infections, core body temperatures can rise to equally dangerous levels. This is hyperthermia. Life threatening hyperthermia typically starts in humans when their temperatures rise to 40.6-41.7degC. Only a few days at this extraordinarily high temperature level is likely to result in the worsening of internal organs and death.
Question: Why can humans keep stable body temperatures in different seasons?
Options: (A) Because their bodies are unusually efficient. (B) Because they experience different climates. (C) Because they can adjust to cultural patterns and technologies. (D) Because they have internal temperature regulating systems.
Example Output: D

Example Input: Article: Learning a Second Language Some people learn a second language easily. Other people have trouble learning a new language. How can you help yourself learn a new language, such as English? There are several ways to make learning English a little easier and more interesting. The first step is to feel confident about learning English. If you believe that you can learn, you will learn. Be patient. You don't have to understand everything all at once. It is natural to make mistakes when you learn something new. We can learn from our mistakes. The second step is to practise your English. For example,write in a diary every day. You will get used to writing in English,and you will feel comfortable expressing your ideas in English. After several weeks, you will see that your writing is improving. Besides, you must speak English every day. You can practise with your classmates after class. You will all make mistakes, but gradually you will become comfortable _ in English. The third step is to keep a record of your language learning. You can write this in your diary. After each class, think about what you did. Did you answer a question correctly? Did you understand anything the teacher explained? Perhaps the lesson was difficult, but you tried to understand it. Write these achievements in your diary. You must be active in learning English and believe that you can do it. It is important to practise every day and make a record of your achievements. You will enjoy learning English, and you will feel more confidence in yourself.
Question: When you learn English, you do not need to _ .
Options: (A) be patient (B) make mistakes (C) express your ideas in English (D) understand everything at once
Example Output:
D