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: Once upon a time the colors of the world started to quarrel. Green said, "Clearly I am the most important. I am the sign of life and hope. I was chosen for grass, trees and leaves. Look over the countryside and you will see that I am in the majority." Blue interrupted, "You only think about the earth, but consider the sky and the sea. It is the water that is the basis of life." Yellow chuckled . "The sun is yellow, as well as the moon and the stars. Every time you look at a sunflower, the whole world starts to smile." Red could bear it no longer. "I am the ruler of all of you. I am blood-life's blood! I am the color of danger and bravery. I bring fire into the blood. I am the color of passion and love." Purple stood at his full height. "I am the color of royalty and power. I am the sign of authority and wisdom. People do not question me! They listen and obey." Finally Indigo spoke with determination, "Think of me and I am the color of silence. I represent thought and reflection. You need me for balance and contrast , for prayer and inner peace." The colors went on boasting , each showing off his or her own advantages. Suddenlythere came a flash of bright lightening. Thunder rolled and boomed. Rain started to pour down. The colors were scared to death. In the midst of the quarrelling, rain began to speak, "You foolish colors. Don't you know that you were each made for a special purpose, unique and different? Join hands with one another and come to me." Doing as they were told, the colors united and joined hands. From then on, when it rains, colors will stretch across the sky in a great bow of color. Whenever a rainbow appears in the sky, let us remember to appreciate one another.
Question: Why did the colors quarrel?
Options: (A) Because they often fought for some reasons. (B) Because they were not liked by each other. (C) Because they all claimed to be the best. (D) Because they all wanted to rule other colors.

Ex Output:
C

Ex Input:
Article: A Russian legend has a story about the origins of cats. The cat's coat, it was said, was originally designed for the dog, but the dog became so impatient when coats were being handed out that he was told to wait at the back of the queue. The cat was given the fur instead of the dog. This, according to Russian folk storied, is the origin of why dogs dislike cats. A nameless cat with a taste for travel flew for three weeks between New York and Tel Aviv in 1984. It escaped from its owner's cat-box in the plane's luggage compartment on the first trip and all efforts to get it out with bowls of milk and food failed. After nearly 80,000 miles of flying the airline called in a vet who got it out. The Chinese attitude to the cat was not clear. Cats were welcome for their ability to kill mice and were considered suitable pets for women. On the other hand, they were suspected of bring bad luck into the home. In the days before the invention of the watch, it was said that they used their cats as clocks. The pupils of the cat's eyes were believed to gradually change shape with the position of the sun in the sky. At midday they were a narrow line and they gradually became rounder until sunset. Britain's cleanest cat is undoubtedly Harvey, a five-month-old Persian who climbed into his owner's washing machine. He went through a ten-minute wash cycle before someone noticed him through the glass door, and pressed the "stop" button. Harvey was soon back to his usual self. Cats seem to be able to sense earthquakes. Josie, who lives in California, warned her family of a quake in 1971. She wore her owners. Mr. and Mrs. Miller, at 5:50am by jumping onto the bed and running around. When the Miller followed her out of the house, Josie ran off. The earthquake was only a small one, but the cat raised the alarm every time there was a quake after that.
Question: From the Russian legend we know the dog _ .
Options: (A) sees the cat his friend. (B) received the fur coat. (C) disliked the fur (D) got punished by God

Ex Output:
D

Ex Input:
Article: Computers are very important to modern life.Many people think that in the future computers will be used in lots of everyday life.It is thought that we won't have to go shopping because we will be able to get most things which are sold in shops on the Internet.There will be no more books because we will be able to get all texts from computers.The Internet will be used to play games, see films and buy food.Most telephone calls will be made by computers, too. Some people are glad about those new ways of shopping and communicating .Others do not think that computers will replace our old ways. Some people think that one day we will not read books made of paper. Instead, we will buy and read books using computers, which will keep many different books in them at the same time.We won't need to turn lots of pages and paper will be saved.Computerized books will be used more and more. While many people say it is a pleasure to go into shops and look at things you want to buy.It is also unlikely that many people will want to read large texts on our computers. Because paper books will perhaps be more friendly.Maybe computers won't change these two habits.
Question: Which is the main idea of this passage?
Options: (A) People like going shopping (B) Reading books is important (C) Computers are important (D) Computer can be used to play games

Ex Output:
C