instruction:
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.
question:
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
answer:
No


question:
Article: The old lady was glad to be back at the block of flats where she lived. Her shopping had tired her and the basket had grown heavier with every step of the way home. In the lift her thoughts were on lunch and a good rest, but when she got out at her own floor, both were forgotten in her sudden discovery that her front door was open. She was thinking that she must tell her daily maid the next morning to lock the door, and then she remembered that she had gone shopping after the maid had left and she knew that she had turned both keys in their locks. She walked slowly into the hall and at once noticed that all the room doors were open, yet following her regular practice she had shut them before going out. Looking into the living room she saw a sight of confusion over by her writing desk. It was as clear as daylight then that burglars had forced into the house during her absence. Her first thought was to go round all the rooms looking for the thieves, but then she decided that at her age it might be more reasonable to have someone with her, so she went to fetch the doorman from his basement .By this time her legs were beginning to shake, so she sat down and accepted a cup of a very strong tea, while she telephoned to the police. Then her sense regained, she was ready to set off with the doorman's help to search for any thieves who might still be hiding in her flat. 
 Question: When she saw the front door was open, the old lady forgot about   _  . 
 Options: (A) her basket and desk (B) her keys and lunch (C) her lunch and rest (D) her maid and child 
 Asnwer: C
answer:
Yes


question:
Article: The longest bull run in a century of art-market history ended on a dramatic note with a sale of 56 works by Damien Hirst, Beautiful Inside My Head Forever, at Sotheby's in London on September 15th 2008. All but two pieces sold, fetching more than PS70m, a record for a sale by a single artist. It was a last victory. As the auctioneer called out bids, in New York one of the oldest banks on Wall Street, Lehman Brothers, filed for bankruptcy, starting the most severe financial crisis since the 1920s. The world art market had already been losing momentum  for a while after rising confusingly since 2003. At its peak in 2007 it was worth some $65 billion, thinks Clare McAndrew, founder of Arts Economics, a research firm -- double the figure five years earlier. Since then it may have come down to $50 billion. But the market generates interest far beyond its size because it brings together great wealth, enormous egos , greed, passion and controversy in a way matched by few other industries. In the weeks and months that followed Mr. Hirst's sale, spending of any sort became deeply unfashionable. In the art world that meant collectors stayed away from galleries and salerooms. Sales of contemporary art fell by two-thirds, and in the most overheated sector, they were down by nearly 90% in the year to November 2008. Within weeks the world's two biggest auction houses, Sotheby's and Christie's, had to pay out nearly $200m in guarantees to clients who had placed works for sale with them. The current downturn in the art market is the worst since the Japanese stopped buying Impressionists at the end of 1989. This time experts suppose that prices are about 40% down on their peak on average, though some have been far more volatile  . But Edward Dolman, Christie's chief executive, says, "I'm pretty confident we're at the bottom." What makes this fall different from the last, he says, is that there are still buyers in the market, while in the early 1990s, when interest rates were high, there was no demand even though many collectors wanted to sell. Christie's earnings in the first half of 2009 were still higher than in the first half of 2006. Almost everyone who was interviewed for this special report said that the biggest problem at the moment is not a lack of demand but a lack of good work to sell. The three Ds -- death, debt and divorce -- still deliver works of art to the market. But anyone who does not have to sell is keeping away, waiting for confidence to return. 
 Question: Which of the following statements is true? 
 Options: (A) .Sales of contemporary art fell dramatically from 2003 to 2008. (B) The art market didn't match many other industries in momentum. (C) The market generally went downward in the same way. (D) Some art dealers were awaiting better chances to come. 
 Asnwer: D
answer:

Yes


