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.

Input: Consider Input: Article: Every day Yang Hongwei takes the bus home from work, staring silently at the European-style villas , luxury cars and twinkling lights from the shopping center that he sees through the window. Yang works for a software company in Zhongguancun. He dreams of such a life, away from poverty, and that hope has kept him in Beijing for three years since he graduated from university. Soon Yang squeezes his way off the bus to the reality of his life: his home--a 10-square-metre room that costs 550 yuan(81 US dollars) or about one-fifth of his salary in rent every month. It's very cold inside the house as it has no central heating system. He has to stand the long and cold winter. Determined to achieve his dream, Yang says he has changed jobs "numerous" times in the past three years and is considering quitting his present job. Yang's frustration over his life as a migrant is shared by many other graduates that have moved into big cities. Together they have come to be called the "ant tribe", a term created by Chinese sociologists to describe the struggles of young migrants, who, armed with their diplomas, flood to big cities in hopes of a better life only to put up with low-paying jobs and poor living conditions. They share every similarity with ants. They live in colonies in crowded areas. They're intelligent and hardworking, yet unknown and underpaid. The term, sociologists have said, also reflects their helplessness in a world governed by the law of the concrete jungle--only the strongest survive. A survey in Ant TribeII found nearly 30 percent of the "ants" are graduates of famous key universities--almost three times the percentage of 2009. Most have degrees in popular majors, such as medicine, engineering, economics and management. In addition, 7.2 percent of the "ants" have at least a master's degree compared to 1.6 percent in 2009. Most said the economic recovery did not really improve their financial situations, and 66 percent said their incomes fell short of their expectations, the survey also found. For two years, Lian Si, a post-doctoral fellow at the Center for Chinese and Global Affairs of Peking University, who has studied the phenomenon, led a team of more than 100 graduate students to follow the groups in university towns like Beijing, Shanghai, Guangzhou, Wuhan and Xi'an. Lian evaluates the total population of the "ant community" in major cities at one million across China, with about 100,000 found in Beijing alone. Lian predicts that an increasingly challenging job market will see the ant tribe growing further in number. Another 6.3 million graduates are expected to join migrant workers and other job hunters in what promises to be a fierce labour competition. The ant tribe's embarrassing living situations have become a serious social issue, and the government should develop "second-and-third-tier cities" to attract more graduates from big cities. However, "ants" expect more study and training opportunities in big cities, which keeps them in positive mindsets despite their situations. As in the case of Yang, he is optimistic about getting a new job soon, having received eight interview offers in a week after sending out his resume. The prospect of landing a higher-paying job keeps him hopeful of moving out of the slum district soon. The sooner the better.
Question: . Yang has worked in Beijing since graduation from university _ .
Options: (A) to live in a beautiful villa of European style (B) to have more opportunities to be promoted (C) to struggle for a better-off life in a big city (D) to enjoy a busy life in a software company

Output: C

Input: Consider Input: Article: What would life be like without rich, creamy, mouthwatering, melt-in-your-mouth chocolate? Life would be bitter for most Americans. They spend about $13 billion a year buying all sorts of chocolate treats. However, for the African children who toil under slavelike conditions on cacao plantations, life is not sweet. The cacao bean is the main ingredient in the chocolate. According to a 2002 survey by the International Institute of Tropical Agriculture and the US Agency for International Development, about 284,000 children work in dangerous conditions on cacao farms in western Africa. More than half those children are younger than 14. Many were sold into forced labor to work 12 hours or more a day on the cacao plantations. A number of international organizations, including several African governments, recently began a program to eliminate child labor on cacao plantations. Under the program, government officials will remove children from abusive working situations while teaching farmers about child labor issues. The program will also make borrowing money easier for cacao farmers. Officials hope farmers will use the money to invest in their farms and hire paid laborers.
Question: The cacao bean is the main ingredient in _ .
Options: (A) treats (B) coffee (C) chocolate (D) cigarettes

Output: C

Input: Consider Input: Article: He has climbed a high mountain, raced the 24-hour motorcycle track in France and even, walked from Tokyo to Kyoto, a distance of 500 km. Now Evolta, Panasonic's 7-inch Humanoid Robot is getting ready for his biggest challenge -- the Ironman Triathlon Championship in Hawaii. To compete in this exhausting contest, the green & white robot which is small enough to fit on a human palm, will have to swim 2.4 miles in the rough ocean, bike 112 miles across the hot Hawaiian desert and, run a full marathon distance of 26.2 miles in the painfully hot weather. Given that he is so tiny and powered by rechargeable batteries of Panasonic, he will be allowed some freedom in the way he competes. For one, he will be starting the race on October 23rd, 2011, three weeks following the real event and, while human competitors have at most 17 hours to complete the triathlon, Evolta will be given 7 days, during which his only "breaks" will be to recharge his batteries. The biggest difference however, will be that unlike a single human body doing all three races, there will be three different "Evolta" robot bodies competing -- each built for the specific race. Evolta the swimmer will be equipped with special arms to swim forward. Evolta the biker, will be on a little two-wheeler with training wheels, while Evolta the runner, will be fixed on what looks like a wheel. In spite of all these advantages, the robot's creator Tomotaka Takahashi believes that the race will be a huge challenge -- not only will Evolta have to battle the wind and sun, but also, small road obstacles that humans just step over. The water will be even worse thanks to the strong waves, tides and ocean winds. But if he does complete it, Evolta will add another feather in his cap and just prove the already well-known fact that Panasonic's rechargeable Evolta batteries are indeed the "world's longest-lasting batteries"!
Question: When competing in the triathlon, Evolta _ .
Options: (A) has to finish the competition in 17 hours (B) will be allowed to have a break from time to time (C) will start three weeks earlier than other competitors (D) will have three specially-built bodies for the competition
Output: D