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.

[Q]: Article: Mattel Inc. is _ 4.4 million Polly Pocket toys with magnets after some of them caused serious injuries to children who swallowed magnets that fell off. Tiny magnets inside the toys may fall off without being noticed by parents and babysitters. The magnets can be swallowed or placed in children's noses or ears. When more than one magnet is swallowed, the magnets can attract each other and cause intestine perforation which can be deadly. The Consumer Product Safety Commission(CPSC)received 170 reports of the small magnets coming out of these recalled toys. There were three reports of serious injuries to children who swallowed more than one magnet. All three suffered intestinal perforations that required operation. A 2-year-old child stayed in hospital for seven days and a 7-year-old child was hospitalized for 12 days. An 8-yeal-old child was also hospitalized. The recalled Polly Pocket toys contain plastic dolls and accessories that have small magnets. The magnets measure one-eighth inch in diameter and are fixed in the hands and feet of some dolls, and even in the plastic clothing, hairpieces and other accessories to help the pieces stay on the doll or the doll's house. The model number is printed on the bottom of the largest pieces on some of the toys. Contact Mattel if you cannot find a model number on your product to determine if it is part of the recall. Polly Pocket magnetic toys currently sold in stores are not included in this recall. The model numbers included in the recall are: B2632, B3158, B3201, B7118, G8605, H1537, H1538 and H3211. The toys were on sales in department stores and toy stores from May 2006 through September 2009 for between $15 and $30. Consumers should immediately take these recalled toys away from children and contact Mattel for the return of the toys. For more information contact Mattel at 888 597-6597 anytime or visit the company's Web site.
Question: The main purpose of the passage is _ .
Options: (A) to criticize Mattel Inc. for their bad products (B) to inform readers of Polly Pocket toys recall (C) to warn readers the danger of swallowing magnets (D) to suggest some ways to return Polly Pocket toys
[A]: B

[Q]: 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
[A]: C

[Q]: Article: Do you want to live another 100 years or more? Some experts say that scientific progress will one day help humans to last tens of years longer than what is now seen as the natural limit of the human life span . " I think _ ," said Michael Zey, a Montclair State University business professor and author of two books on the future. " I think by 2075 we will see it and that's a conservative estimate ." At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark said progress in using genes as well as nanotechnology makes it likely that humans will live in the future beyond what has been possible in the past. " There is a great push so that people can live from 120 to 180 years," he said. " Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years." However, many scientists who research into aging are doubtful about _ and say the human body is just not designed to last about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death. Scientists also disagree on what kind of life the super aged might live. "It remains to be seen whether you could be healthy enough to have good quality of life when you pass 120." said Leonard Poon, director of the University of Georgia Gerontology Center. " At present people who could get to that point are not in good health at all."
Question: By saying " we are knocking at the door immortality", Michael Zey means _ .
Options: (A) they believe that there is no limit of living (B) they are sure to find the truth about long living (C) they have got some ideas about long living (D) they are able to make people live beyond the present life span
[A]:
C