input question: Write a multi-choice question for the following article, with the given choices and answer: Article: You may have seen a talking parrot on a TV show, in a movie, or even in someone's home. The parrot has learned to copy sounds that people make. Birds are not the only animals that can copy the noises they hear. Dolphins, bats, and some apes also copy sounds. Now we can add elephants to this list of copycats. Dr. Joyce Poole is a zoologist. She studies the sounds of elephants. While she was in Kenya, she would hear strange noises made by Mlaika after sunset. Mlaika was a 10-year-old African elephant. Mlaika lived near a highway. Dr. Poole says, "I could not tell the difference between Mlaika's call and the distant truck noise." She and other scientists studied Mlaika's sounds. It turned out that Mlaika was copying the sounds of the trucks driving by. Why would Mlaika copy trucks that she heard going by on the highway? Animals that are able to copy sounds may enjoy practicing new sounds. When they are kept outside of their natural environment, they may copy unusual sounds. That may be why an elephant would copy the sound of a truck. "Mlaika was not the only copycat elephant," Dr. Poole says. Calimero is a 23-year-old male African elephant. He spent 18 years with two female Asian elephants. Asian elephants make chirping sounds (sounds made by birds) to talk with one another. African elephants usually do not make chirping sounds. But Calimero now does. He is copying his Asian elephant friends. Dr. Poole says that elephants need to form bonds with their family and friends. She says, "They make sounds to communicate with each other. When they are separated, they use sounds to keep in contact." Parrots, dolphins, humans, and elephants show that being a copycat is one way that animals and people make new friends and keep old ones. Options: A To clarify the meaning of copycat elephants. B To show the cleverness of African elephants. C To add another example of copycat elephants. D To introduce a special life skill of Asian elephants. Answer: C To add another example of copycat elephants. Question:???
output answer: Why is Calimero mentioned in the passage?

Write a multi-choice question for the following article, with the given choices and answer: Article: BEIJING, March 7 (Xinhua) -- Beijing will take a series of measures to tackle its environmental problems and is confident they will not derail its bid to host the 2022 Winter Olympics, an official said on Thursday. Beijing has formulated 84 measures to deal with environmental issue and air pollution, said Li Shixiang, Beijing's executive vice mayor, at the ongoing annual session of the National People's Congress, the top legislature. Beijing is expected to cut its current coal consumption by more than half to 10 million tonnes a year by 2017. It will also impose tough controls over industrial pollution and dust fall from construction sites, while reducing the number of newly added vehicles every year to 150,000, said Li. He said the Chinese capital will benefit from the experience of successfully holding the 2008 Beijing Olympics. Beijing and Zhangjiakou City in neighboring Hebei Province will launch a joint bid to host the 2022 Winter Olympic Games, the Chinese Olympic Committee (COC) announced in early November 2013. Beijing will bid to stage the ice events while Zhangjiakou will seek hosting rights for snow sports, according to the COC. Beijing has been _ by choking smog and it is a great concern for its chances of hosting the Winter Olympics. Options: A Beijing will cut its current coal consumption. B Beijing will reduce the number of newly added vehicles every year. C Beijing will firmly control industrial pollution and dust fall from construction sites. D Smog will hurt Beijing's Winter Olympics bid. Answer: D Smog will hurt Beijing's Winter Olympics bid. Question:
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Answer: Which statement is true according to the passage?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Do you know about a series of books that say they are for dummies? These American selfhelp books have been translated into more than thirtynine languages including Chinese, Arabic, Russian, French, German, Greek and Spanish. "Dummy" is a word for a stupid person. The dummy books are not really for stupid people. They are designed to show people how to do something they may never have tried before, like painting a house or learning a language. The books all say in a funny way that they are for dummies, such as WorldHistoryforDummies, RabbitsforDummies, ChineseCookingforDummies, andWeddingPlanningforDummies. The first such book,DOS forDummies, was published in 1991.It helped people learn how to use the DOS operating system for computers. Since then, more than one hundred and fifty million dummy books have been sold. The dummies.comwebsite explains the idea behind the books. It says that they show that people can be taught to do anything. First they can make fun of ideas that are difficult to understand. Then they show how the information can be interesting and easy. he publishers say that the books do not provide more information than necessary. They give readers just enough information to do what they want. They say that the dummy books give the best and easiest way to do something. And the books use simple and easy language. There are more than one thousand different dummy books. A report in NewYorkTimessays that the topselling dummy books are those that explain technology and personal finance. The publishers say that the bestselling dummy books are those providing information many people need--like information about diseases,education and cooking. People interested in opera,car repair and wine can also find dummy books to help them. And there are even more dummy books to come. The publishers say that they publish about two hundred new dummy books every year. Options: A they provide just what is needed and are easy to understand B they provide abundant information on the concerning subject C people can learn to do anything with just one copy D people can save lots of money through selfteaching Answer: A they provide just what is needed and are easy to understand Question:
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The answer is:
The dummy books have been popular because _ .