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.

Ex 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

Ex Output:
C

Ex Input:
Article: One day the employees of a large company in St Louis,Missouri returned from their lunch break and were greeted with a sign on the front door. The sign said:"Yesterday the person who has been hindering your growth in this company passed away. We invite you to join the funeral in the room that has been prepared in the gym." At first everyone was sad to hear that one of their colleagues had died,but after a while they started getting curious about who this person might be. The excitement grew as the employees arrived at the gym to pay their last respects. Everyone wondered:"Who is this person that was hindering my progress? Well,at least he's no longer here." One by one the employees got closer to the coffin and when they looked inside it they became speechless. They stood over the coffin,shocked and in silence,as if someone had touched the deepest part of their soul. There was a mirror inside the coffin:Everyone who looked inside it could see himself. There was also a sign next to the mirror that said. "There is only one person who can set limits to your growth:it is YOU." You are the only person who can revolutionize your life. You are the only person who can influence your happiness,your realization and your success. You are the only person who can help yourself. Your life does not change when your family changes,when your friends change,when your boss changes,and when your company changes. Your life changes when YOU change,when you go beyond your limiting beliefs,when you realize that you are the only one responsible for your life.
Question: The writer's purpose in writing the article is to tell us that _ .
Options: (A) the harder we work,the more successful we will become (B) our work and life are closely connected with others (C) changing our lives is down to us (D) we will have a better future if people do not hinder our development

Ex Output:
C

Ex Input:
Article: The United States is not part of the Kyoto Protocol.But since 2005 more than 1,000 mayors across the country have agreed to sign their own version of the protocol. It is called the United States Conference of Mayors' Climate Protection Agreement.Local leaders have agreed to follow the suggestions of the Kyoto Protocol in their communities.They have also agreed to urge state and federal governments to follow these suggestions.One goal is to reduce air pollution to the 1990 levels by 2012. A "green" city might work on several kinds of environmental goals and programs.These include air quality,reducing electricity use, green building, public health, the reuse of materials, water quality and clean transportation. The Natural Resources Defense Council works to protect the environment through action, law and science.One of its online projects is called Smarter Cities, which lists some cities that have made important environmental steps. Washington,D.C.is also a leading city for green roofs,with over 92,000 square meters of green rooftops.The city also launched a program called "Skip the Bag,Save the River."Stores charge people a fivecent tax for using plastic or paper shopping bags instead of reusable bags.Money from the tax will be used to clean up a local river. New York City is using water as a renewable energy source.For several years, the city has experimented with water in the East River to create energy.Officials operating the program recently asked for permission to put into place 30 river turbine devices. The people of Portland, Oregon are among the top recyclers in the nation.People living there recycle over half of the waste they throw out.The city has also worked to provide green transportation by providing safe bike paths and free parking spaces where electric cars can get recharged. In Oakland, California, you can ride on one of several public hydrogenpowered buses.These buses release zero pollution into the air.However,they cost about five times more than common buses.
Question: The United States Conference of Mayors' Climate Protection Agreement is aimed at _ .
Options: (A) reducing energy use (B) reducing air pollution (C) improving public health (D) reusing waste materials

Ex Output:
B