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 Q]: Article: Once I invited a group of friends round to my house, telling them that I was going to record their speech. I said I was interested in their regional accents, and that it would take only a few minutes. Thus, on one evening, three people turned up at my house and were shown into my front room. When they saw the room they were a bit alarmed, for it was laid out as a studio. In front of each easy chair there was a microphone at head height, with wires leading to a tape-recorder in the middle of the floor. I explained that all I wanted was for them to count from one to twenty. Then we could relax and have a drink. I turned on the tape-recorder and each in turn seriously counted from one to twenty in their best accent. When it was over, I turned the tape-recorder off and brought round the drinks, and for the rest of the evening there was general cheerful conversation--interrupted only by the fact that I had to take a telephone call in another room, which unfortunately lasted some time. Or at least that was how it would appear. For, of course, the microphones were not connected to the tape-recorder in the middle of the room at all but to another one, which was turning happily away in the kitchen. The participants, having seen the visible tape-recorder turned off, paid no more attention to the microphones which stayed in front of their chairs, only a few inches from their mouths, thus giving excellent sound quality. And my lengthy absence meant that I was able to obtain as natural a piece of conversation as it would be possible to find. I should add, perhaps, that I did tell my friends what had happened to them, after the event was over, and gave them the choice of destroying the tape. None of them wanted to--though for some years afterwards it always seemed to be my round when it came to the buying of drinks. Linguistic research can be a very expensive business.
Question: The writer asked his friends to count from one to twenty because _ .
Options: (A) he wanted to record the numbers for his research (B) he wanted to find out whether the tape recorder was working (C) he wanted to make his friends relax before real recording started (D) he wanted his friends to think that was all he wanted to record
[EX A]: D

[EX Q]: Article: The students were not exactly overjoyed that Steve Jobs was going to be the speaker. Everyone wanted Bill Clinton. After all, his daughter Chelsea had gone to school at Stanford. So every year that Clinton was not named speaker was a disappointment no matter who it was. Graduation is not in order. It wasn't until we started walking into the stadium that I even realized that I'm actually graduating right now. Stanford has this tradition, the wacky walk, where everyone dresses up in different clothes or throws Frisbees or beach balls. I'm from the South so I had a seersucker suit shipped in from back home in Georgia. Some other guys dressed up as iPods. It was good fun. That was an interesting contrast to Job's speech. He started talking about being fired from Apple and then having cancer, how doctors told him he was going to die and how he was adopted as a baby into a family with parents who never went to college --- an unusual experience that played out over his life. His speech was very raw and very open. He told us that he gets up every morning and looks in the mirror and asks "If today were the last day of my life, would I want to do what I am about to do today?" "If the answer is not for too many days in a row", he said, "it's time to make a change. That has really driven a lot of my decisions since then. When I've reached certain points in my job where I'm not very excited to get to work early or stay late or work on something over the weekend or all night. When I lose that excitement then it's probably not the right thing for me anymore". He said, "Your time is limited, so don't waste it living someone else's life." Exactly. Death is a great motivator. You have to get out there and do something because some day you won't be there. Of all the advice I've received I rely on that the most.
Question: The students went into the stadium to _ .
Options: (A) dress up in different clothes (B) listen to the speech (C) have the wacky walk (D) throw Frisbees or beach balls
[EX A]: B

[EX Q]: Article: The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory illnesses and led to calls for laws to control the pollution. Pan Shiyi, a celebrity real estate developer said he is planning to propose a Clean Air Act to the local government. As a representative to the Beijing Municipal People's Congress, he started an online survey at 9:20 a.m. Within three hours, more than 25,000 web users, or 99 percent of total respondents , welcomed his proposal on Sina Weibo, China's Twitter. They have good reasons to stand alongside Pan. The latest round of haze reduced visibility to under 500 meters in many parts of the city. The smog has also led to a great increase in respiratory illnesses, particularly among children and the elderly. Anxious parents and doctors almost all blame the smoggy air for the illnesses. Though most schoolchildren are home for the winter holidays, the bad air can easily move indoors. Besides, ordinary medical masks fail to provide adequate protection, so some people have turned to gas masks and respirators . The causes of the scary smog are rather mysterious, though experts blame excessive emissions and the mountains around Beijing that trap pollution in winter, unless there is adequate wind to clear it away. Some critics have pointed fingers at China's top two oil firms, China National Petroleum Corp and China Petrochemical Corporation, saying the companies' outdated production technologies produce large quantities of substandard, high-polluting gas fuel. Meanwhile, concerned Beijingers have moved their brainstorming sessions to cyberspace. If Pan's proposal for a Clean Air Act is adopted, netizens say the new law should include items providing for "car-free days" in times of smog, higher standards for vehicle fuel, stricter restrictions on industrial and exhaust gas emissions, and more effective protection for the public. Beijing is not the only city that has ever lost the blue sky. Five days of thick fog caused thousands of deaths in Britain in December 1952, urging the government to pass the first Clean Air Act in 1956, which introduced smokeless zones and cleaner fuels to reduce pollution. That may provide some experience for Beijing to refer to.
Question: What can we learn from the passage?
Options: (A) People are clear about the causes of the smoggy weather. (B) Children staying indoors will not get respiratory illnesses. (C) Smog is worse for people with lower resistance to diseases. (D) Masks can give people protection against the smoggy weather.
[EX A]:
C