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: I believe children have a very pure sense of humor. Well, I would like to share my experiences with you. The other day when I was out with a friend and her daughter Jane at a restaurant, Jane ordered an apple dessert, which was the most attractive dish in that restaurant. However, when she had a bite of the pie, she shouted loudly, "Mom, why does it look good but tastes like rubber?" My friend was uneasy. Then the waiter gave us another dish. A child can say funny things. I was at a friend's home for tea and her son, Mark, wanted her to get up. His mom replied, "I can't, because my foot has fallen asleep now." Little Mark then sang a song and asked, "Mom, will it wake up now?" We laughed together. The other day we were having an interesting conversation over lunch and my friend, an animal activist , was arguing with another group member. Her son Tommy suddenly stood up, "Mom, people should never be allowed to shoot extinct animals!" That was funny and the child did manage to turn the argument into a pleasant conversation. Well, children sometimes really surprise us. I think we can have a lot to learn from them. They can help us understand the simple world through their eyes.
Question: Why did Jane shout loudly in the restaurant?
Options: (A) She wanted to make us laugh. (B) She thought her dish was attractive. (C) She wanted another piece of dessert. (D) She didn't like the flavor of her food.
Example Output: D

Example Input: Article: Can you imagine exchanging the pleasure of city life for a quiet life in the countryside? Many people want to move from the country to the city because they think that life in the city is more exciting and better than that in countryside, especially young people who like new, modern things. People like popular things and feel that they can only find the latest styles in the city. However, it is possible to enjoy the higher quality of country life and still enjoy some of the advantages of living in the city. Nowadays, traveling is fast and easy, and information can be found on the Internet, so many people are able to do their work in home offices. Because they have e-mail and personal computers, they don't have to be in big cities to manage their businesses. It is not important where they actually work because the results of their work can be sent everywhere with e-mails. Therefore, there is no need to put up with all of the disadvantages of the city. Now they can escape busy city life to enjoy the quiet country life and still be able to have successful jobs. Other people are interested in technological things and high-tech jobs and think they can only find them in big cities. If they want to find a job, especially a good position in a company, they think that they have to live in a city. For these jobs, they are willing to put up with many of the disadvantages of city life, such as crime, heavy traffic, and pollution.
Question: The main idea of this passage is that _ .
Options: (A) life in the city is different from life in the countryside (B) people prefer living in the city to living in the countryside (C) cities have more disadvantages than the countryside (D) more and more people like living in the city
Example Output: A

Example Input: Article: Look at the keyboard of any standard typewriter or computer."Q,""W,""E,""R""T"and"Y"are the first six letters.Who decided on this arrangement of the letters? And why? People tried for centuries to invent the typewriter.In 1714 in England,Henry Mill filed a patent for a machine called An Artificial Machine Or Method for the Impressing or Transcribing of Letters,Singly or Progressively one after another, as in Writing,whereby all Writing whatsoever may be Engrossed in Paper or Parchment so Neat and Exact as not to be distinguished from Print.That machine probably didn't sell because no one could remember its name! The first practical typewriter was patented in the United States in 1868 by Christopher Latham Sholes.His machine was known as the type-writer.It had a movable carriage,a lever for turning paper from line to line,and a keyboard on which the letters were arranged in alphabetical order. But Sholes had a problem.On his first model,his"ABC"key arrangement caused the keys to jam when the typist worked quickly.Sholes didn't know how to keep the keys from sticking,so his solution was to keep the typist from typing too fast.Sholes asked his brother-in-1aw to rearrange the keyboard so that the commonest letters were not so close together and the type bars would come from opposite directions.Thus they would not clash together and jam the machine.The new arrangement was the QWERTY arrangement typists use today.Of course,Sholes claimed that the new arrangement was scientific and would add speed and efficiency.The only efficiency it added was to slow the typist down,since almost any word in the English language required the typist's fingers to cover more distance on the keyboard. The advantages of the typewriter outweighed the disadvantages of the keyboard.Typists memorized the crazy letter arrangement,and the typewriter became a huge success.By the time typists had memorized the new arrangement of letters and built their speed,typewriter technology had improved,and the keys didn't stick as badly as they had at first.
Question: The author thinks the machine invented by Henry Mill could not be sold because _ .
Options: (A) it was difficult for people to accept new things (B) there were great disadvantages of the key board (C) the machine could not be distinguished from print (D) the name of the machine was too long
Example Output:
D