In this task, you're given an article, a question which often contains a blank, four options (associated with "A", "B", "C", "D") and the answer to that question. Your task is to classify whether the given answer is correct or not by providing "Yes" or "No", based on the article.

Article: Have you ever wondered why stems grow upwards and roots downwards? Why plants always seem to turn, towards the light and climbing plants run up rather than down? The answer is simple:auxin,a chemical substance that controls growth in plants. Auxin gives away its secrets Auxin is a plant hormone . Darwin was already interested in it in the 19th century. Only in recent years, however, has the hormone started to give away its secrets ,thanks to intensive molecular research.Auxin is produced in the young,growing parts of plants and then transported throughout the plant-to a low -lying stem for example. The stem needs to straighten out as soon as possible to be able to absorb the topside,resulting in the underside growing faster and the stem straightening out. For the same reason, plants in front of windows will always turn to the light . This active regulation of auxin transport allows plants to take ideal advantage of local and changing conditions. A new means of transport for auxin? The transport of auxin through the plant plays a vital role. And ,from all appearances,it is not a simple matter. The researchers identified an important new link and means of transport for auxin: PILS proteins . PILS proteins are vital for auxin-dependent plant growth and adjust the intracellular storage of the hormone. It is exactly this compartmentalizing of auxin that seems functionally important for the various developmental processes. Growing crops more efficiently: the right amount of auxin in the right place Higher auxin levels at the right moment and in the right place result in better growth and greater harvest. Better adjustment of auxin levels would make plants grow more efficiently. The researchers hope to contribute to the development of more efficient growing processes by continuing to sort out auxin transport processes.
Question: Which of the following is true of ausin according to the text?
Options: (A) It helps the plant to bend at the right places while growing. (B) It prevents the roots of plants from growing faster. (C) It is no use when the surroundings have changed. (D) It helps the underside of plants grow faster than the topside.
Asnwer: C
No

Article: BEIJING, Oct.14(Xinhua)----A total of 120 middle school students from 35 countries will attend the final of an international China language contest, to be held in southwest China's Chongqing Municipality from Oct.16 to 30. The candidates, aged from 15 to 20,must be from foreign countries and not native Chinese speakers, said a statement issued by the Chinese language Council (CLC),the contest's organizer, here Thursday. All of the candidates have passed the preliminary contests held in their own countries. According to the organizer, the competition will have a top prize, five second prizes,10 third prizes and a dozen prizes for special talents.The organizer will also launch an online vote for "the most liked candidate." It was the third year China has held the contest. "The competition not only tests the proficiency of Chinese language but also the candidates capability to communicate across different cultures."the statement said. All the candidates in the final will receive scholarships from the Chinese government.said Hu Hangyu, an official with the Education Bureau of the Chongqing Municipality, jointly organizing the contest. They will also meet local Chinese students and live with Chinese families, Hu said. "The competition is to meet the increasing demand for Chinese learning by foreign youngsters."said Xu Lin.the CLC director. The CLC has also hosted similar contest for foreign college students since 2002. China has been working to promote Chinese language learning abroad over the past few years.According to the CLC, the country had 282 Confucius Institutes and 272 "Confucius Classrooms" in 88 countries and regions as of 2009 since the first one was established in 2004.
Question: The text is intended to _ .
Options: (A) show the popularity of Chinese language learning in the world (B) introduce an international Chinese language learning test system (C) make readers aware of the importance of Chinese language learning (D) report an international Chinese language contest to be held
Asnwer: C
No

Article: This year, some twenty-three hundred teenagers from all over the world will spend about ten months in their US homes. They will attend US schools, meet US teenagers, and form impressions of the real America. At the same time, about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world. Here is a two-way students exchange in action. Fred, nineteen, spent last year in Germany with George's family. In turn, George's son Mike spent a year in Fred's home in America. Fred knew little German when he arrived, but after two months' study, the language began to come to him. School was completely different from what he had expected --- much harder. Students rose respectfully when a teacher entered the room. They took fourteen subjects instead of the six that are usual in the United States. There were almost no extracurricular activities. Family life, too, was different. The father's word was law, and all activities were around the family rather than the individual . Fred found the food too simple at first. Also, he missed having a car. 'Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk, but you soon learn to like it.' At the same time, in America, Mike, a friendly German boy, was also forming his idea. 'I suppose I should criticize American schools,' he said. 'It is too easy by our level. But I have to say that I like it very much. In Germany we do nothing but study. Here we take part in many activities. There ought to be some middle ground between the two.'
Question: The exchange programme is mainly to _ .
Options: (A) help teenagers in other countries know the real America (B) send students in America to travel in Germany (C) let students learn something about other countries (D) let teenagers learn new languages
Asnwer: A
No