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: 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: School is out for the summer in some areas, and for many children, that means weeks of sleeping in late, trips to the swimming pool or hours spent in front of the TV. These months of inactivity--- away from the daily tiring things of school--- are something that young people look forward to, but it can have a detrimental influence on the knowledge they have. Studies have shown that children lose a lot in math skills during the summer months. Children who spend little time learning experience a much greater amount of learning loss than those who often take part in summer programs. So when school starts again in the fall, teachers often have to spend several weeks reteaching children material that they have forgotten. Experts suggest that parents make sure the summer months are a time of continued learning. For example, they suggest that lunch time is good time to improve a child's spoken skills, simply through conversation. A trip to the supermarket can be an opportunity to improve a child's math skills by having him or her add up the cost of food. And there is no better way to prevent learning loss than by having a child read every day. Fortunately, there are many programs that can help parents. The best place to start is at your local library. Most libraries have summer reading programs that are filled with fun activities. A. strong musical education also improves learning. Find out summer music camps in your area. We think that children should have fun during the summer break, but it should not be a vacation from learning. We strongly suggest parents should take advantage of the many educational opportunities available for their children during the coming weeks.
Question: Children lose a lot in learning in the summer break because they_.
Options: (A) do homework before the TV (B) stay up late at night (C) visit the swimming pool (D) spend little time learning

Ex Output:
D

Ex Input:
Article: Mobile communications and the IP phone business have gradually replaced traditional long-distance calls. Mobile communications account for 28.5 percent of the total long-distance communications business. IP phones have 41.4 percent, while traditional long-distance calls are down to 30.1 percent. China Mobile, the country's largest mobile communication operator, has accounted for nearly 40 percent of taxes in the domestic telecom market. That puts it at the top of the six major telecom operators in the nation, according to the latest official statistics. The other five are: China Telecom, 31.1 percent; China Netcom, 16.6 percent; China Unicom, 13.4 percent; China Satellite Communications Corp and China Railcom, 1.5 percent. China Mobile is being chased by smaller rivals China Unicom and China Telecom, both of which are making significant 3G subscriber gains. That's aided in no small part by deals to offer the iPhone. However, as of March, China Mobile did have 15 million iPhone users on its network. In another ranking, Xiaomi, Huawei, Lenovo, vivo and OPPO came in as the top five mobile phone sellers in China by April, 2015, according to IHS Technology. The report also says that during this period, China produced 82 million handsets. (including GSM, GPRS and CDMA phones) and sold 80 million. Of the phones sold, 37 million were exported to other countries. Analysts point out that China's lack of core technologies and its heavy reliance on overseas technologies have proved to be an obstacle for development of domestic phone makers.
Question: Nowadays, mobile communications have gradually taken the place of _ .
Options: (A) IP phone service (B) telecom operators (C) traditional telephones (D) traditional long-distance calls

Ex Output:
D