In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
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Question: Article: There is no excuse for not doing yourassignments . If you can't come to school, you should call your teacher or your classmate and ask about homework. It is yourresponsibility to find out what homework you have missed. It is not the teacher's job to remind you of the missed assignments. You must not be absent on a test day. If you are seriously ill, call and let the teacher know you will not be there for the test. If your teacher allows amake-up test ,you should take the test within one or two days after you return to class. Serious illness is the only reason for missing a test. Be on time! It is impolite to be late. Also, it bothers other students. If you must come in late, be sure to do it quietly. Have your books and papers out of your bag before you come into the room. Then go to your seat and sit down quietly. In the USA, it is not necessary to knock before you enter the classroom. Most teachers will give you a low grade if you are often late. In America, you should call your teacher by his or her last name instead of " teacher". Also you should use Mr, Miss, Ms or Mrs before the last name ( such as Mrs Smith or Mr Jones). This is polite. The teacher will tell you the title that he or she likes. It is impolite in the USA to eat, drink or chew gum during class. Don't do these until the break. Also, removing your shoes in the classroom is not polite.
Answer: Call your teacher or your classmate to find out what assignments were given.

Answer: What should you do if you miss a class?

Question: Article: Columbus made four voyages to the west between 1492 and 1504 in his vain search for a sea route to Asia. The mystery of why he failed to find it haunted him and filled him with sadness. Wherever he went to Cuba, Puerto Rico, Jamaica, South America, Panama, down the coast of Central America--it was always the same story. Instead of golden palaces, there were grass huts and palm-leaf tents. Instead of silk-robed merchant princes, he found "Indians" who did not have so much as a shirt on their backs. When Columbus explored the West Indies in 1493,he heard tales of a fierce Indian tribe who literally devoured its defeated enemies after a battle. These people were called by many names in the area, including Calina, Canima, Carib, and Caniba. Columbus recorded the name of the American natives as Canibales in Spanish, a word which came to refer, within a few years, to any eater of human flesh. In the similar fashion, the word Caribbean, a title for the sea as well as for the region, came into English. At times Columbus knew that this new land was not China, not Japan, not the Spice Islands. He seemed to accept it as a part of the earth that the geographers of Europe had never heard of before. It was another world--and he called it exactly that--but Columbus also insisted until he died that land he had reached was an unknown part of Asia.
Answer: Columbus' voyages

Answer: What is the best title for this text?

Question: Article: If a diver surfaces too quickly, he may suffer the bends. Nitrogen dissolved in his blood is suddenly liberated by the reduction of pressure. The consequence, if the bubbles accumulate in a joint, is sharp pain and a bent body -- thus the name. If the bubbles form in his lungs or brain, the consequence can be death. Other air-breathing animals also suffer this decompression sickness if they surface too fast: whales, for example. And so, long ago, did ichthyosaurs . That these ancient sea-animals got the bends can be seen from their bones. If bubbles of nitrogen form inside the bone they can cut off its blood supply. This kills the cells in the bone, and consequently weakens it, sometimes to the point of collapse. Fossil bones that have caved in on themselves are thus a sign that the animal once had the bends. Bruce Rothschild of the University of Kansas knew all this when he began a suty of ichthyosaurs bones to find out how widespread the problem was in the past. What he particularly wanted to investigate was how ichthyosaurs adapted to the problem of decompession over the 150 milllion years. To this end, he and his colleagues traveled the world's natural-history museums, looking at hundreds of ichthyosaurs from the Trassic period and from the later Jurassic and Cretaceous periods. When he started, he assumed that signs of the bends would be rarer in younger fossils, reflecting their gradual evolution of measures to deal with decompression. Instead, he was astonished to discover the opposite. More than 15% of Jurassic and Cretaceous ichthyosaurs had suffered the bends before the died, but not a single Trassic specimen showed evidence of that sort of injury. If ichthyosaurs did evolve an anti-decompression means, they clearly did so quickly -- and, most strangly, they lost it afterwards. But that is not what Dr Rothchild thinks happened. He suspects it was evolution in other animals that caused the change. Whales that suffer the bends often do so because they have sufaced to escape a predator such as a large shark. One of the features of the Jurassia oceans was an abundance of large sharks and crocodiles, both of which were fond of ichthyosaurs lunches. Trassic oceans, by contrast, were mercifully shark-and crocodile-free. In the Trassic, then, ichthyosaurs were top of the food chain. In the Jurrasic and Cretaceous, they were prey as well as predator --and often had to make a speedy exit as a result.
Answer: A twisted body.

Answer:
Which of the following is a typical symptom of the bends?