单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. What evidence do people from the West give to show that a higher speed limit is safe

A.The long empty roads between the cities.
B.The modern turbo-charged engine.
C.The current policies of Germany and Australia.
D.The benefits for economy.