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 does the speaker say about the road between Main and Quebec
A．It was built by the Canadians. B．It was built to facilitate trade. C．The path for the road was extremely difficult to clear. D．Hostilities between Canada and the United States caused construction delays.