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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.
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Article: On the second day of the World Internet Conference themed with cybersecurity and international cooperation held in Wuzhen, an official with China's network emergency watchdog said that 6,118 domestic websites have been controlled by the United States, according to Shanghai Securities News. Among the hacked websites in the first half of this year, 48.8 percent were under the thumb of overseas IP addresses, said Huang Chengqing, director-general of the National Computer Network Emergency Response Technical Team and Coordination Center (CNERT/CC). He added that the US contributed the most, followed by Hong Kong, which controlled 3,097, and South Korea with 2,307. Among the overseas IP addresses inserting backdoor programs in domestic websites, the US accounted for 29.3 percent, South Korea for 6 percent and Hong Kong for 5 percent, he said. In addition, 4.9 percent of government websites have been attacked, and 3.2 percent inserted with backdoor programs. Huang also said that the number of Chinese computers affected by Trojan Horse viruses reached 190,000 in the six-month period. To safeguard cybersecurity, the CNERT/CC has cooperated with the Association of Southeast Asian Nations, and built relationships with 59 countries and 127 organizations. Over the past two years, the center dealt with more than 15,000 cross-border online security cases.
Question: The theme of the World Internet Conference is _ .
Options: (A) the safety of the Internet (B) international control and worldwide cooperation (C) cybersecurity and international cooperation (D) network emergency.
answer:
C

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Article: Ever tried taking smart drugs to perform better in exams? They certainly work. Before last summer's exam, a few of my mates, merely out of curiosity, took a considerable amount of Modafinil, a drug normally used for narcolepsy . Guess what? While I was feeling sleepy, bored by revision, my mates were more focused. Modafinil is a smart drug that gives a user a feeling of staying awake for hours. It also sharpens the mind, improves memory and helps problem-solving. But it does more than just keeping you awake. It disturbs your mental system, making you desperate to do what you are doing. You just don't want to do anything else but revise all the time non-stop. A recent study discovers that healthy people use smart drugs, like Modafinil, to get down to and complete tasks they have been putting off, because these tasks seem more enjoyable when taking these drugs. This might sound like what a stressed student desires. However, the pills have a range of side-effects. "At present no evidence shows that these drugs are safe in healthy people," as a medical expert puts it, "Ordering online, though easy, is a dangerous way to obtain drugs. You never know what you're actually purchasing. " In my experience, Modafinil changes people's behaviour too. Over those weeks my friends became different people--in turn aggressive, cold. Even eating became "a waste of time" and so did conversation. A BBC survey found that of those who had tried smart drugs before, 92% would do so again. My friends say they'd happily do so without considering the practice a form of cheating. I admit I was curious--but not enough to try it. Seeing the strange behaviour of other users, I feel a little bit upset and scary. Modafinil may promise to change your grades, but it might also change the way you act. Don't say you haven't been warned!
Question: According to the author, his mates took Modafinil for the purpose of _ .
Options: (A) escaping from reality (B) getting better exam results (C) curing their narcolepsy (D) leading an active life
answer:
B

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Article: Poor Oral Health Leads to Social and Emotional Problems A new report says nearly four-billion people have major tooth decay, or cavities. That number represents more than half of the world's population. Health officials are warning that failure to repair cavities can lead to social and emotional problems. Wagner Marcenes is with the Institute of Dentistry at Queen Mary, University of London. He led a team of researchers as part of the Global Burden of Disease 2010 study. About 500 researchers attempt to collect and examine studies about all major diseases. They used the information to estimate rates of the infection. The report says untreated tooth decay is the most common of all 291 major diseases and injuries. Professor Marcenes says cavities or holes in permanent teeth are also known as caries. "Caries is a chronic disease that shares the same risk factors as cancer, cardiovascular disease. What we're having now is an increase in disease from highly developed countries happening in sub-Saharan Africa and probably it will be in other areas of Africa, too." He says an increase in tooth decay in Africa could be a result of developing countries becoming more like Western nations. "It is likely to be related to a change in diet. Our industrialized diet leads to chronic disease, which includes caries. And that may be the main explanation." Western diets are rich in sugar, a leading cause of health problems in the mouth. Wagner Marcenes says oral health problems can have a major effect on a person's quality of life. First, cavities make eating difficult. Second, people may change what they eat. They may eat softer foods that are not hard to chew. However, softer foods are often fattier foods. But professor Marcenes says the biggest issue in tooth decay is both social and mental. He says the researchers found strong evidence that the mouth has a big influence on socialization. He says many people want to hide bad teeth. They smile less and communicate less. Wagner Marcenes is calling for an "urgent, organized, social response" to the widespread lack of oral health. He believes in a natural method to fight tooth decay by having a healthier diet. He is also calling for the development of new and less costly dental materials and treatments.
Question: From the passage, we know that Wagner Marcenes _ .
Options: (A) works as the leader of the Institute of Dentistry at Queen Mary, University of London. (B) and his researchers accumulate some studies to find out some ways to cure all major disease. (C) is in charge of the activity to estimate the infection rate with the collected and examined studies about all major studies. (D) thinks that the most serious problem caused by tooth decay is cancer that will last for a long time.
answer:
C