单项选择题

Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now listen to the conversation.
Who gave New York its nickname

A．Artists.
B．Musicians.
C．Grocers.
D．Tour guides.
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问答题
[听力原文]A dog is the most useful and faithful animal in the world, but the reasons why people keep a dog have changed. In the old days people used to train dogs to protect themselves against attacks by other beasts. Later they came to realize that a dog was not only useful for protection but also willing to obey his master. When people used dogs for hunting, the dogs would not eat what was caught without permission. Now people in the city need not protect themselves against attacks of animals. Some people keep dogs to protect themselves from robbery or for companionship. For a child, a dog is his best friend when he has no friends to play with. For young couples, a dog is their child when they have no children. For old couples, a dog is also their child when their real children have grown up. The reason why people keep dogs has changed from protection to friendship.
单项选择题
The results of the investigations shows that ______.
A．consumers will spend their money quickly if they expect prices to increase
B．the pricing policy should be based on a correct understanding of consumer psychology
C．remaining stable prices is a correct business policy
D．price increase always stimulate people to hasten to buy things
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