【正确答案】 C

【答案解析】[听力原文] In the 18th century French economists protested the excessive regulation of business by the government. Their belief was laisser faire. Laisser faire means let the people do as they choose. In the economic sense, this meant that while the government should be responsible for things like maintaining peace and protecting property fights, it should not interfere with private business. It shouldn't create regulations that might hinder business growth, nor should it be responsible for providing subsidies to help. In other words, governments should take hands off approach to business. For a while in the United States, laisser faire was a popular doctrine. But things quickly changed. After the Civil War, politicians rarely opposed the government's generous support of business owners. They were only too glad to support government land grants and loans to railroad owners for example. Their regulations kept tariffs high and that helped protect American industrialists against foreign competition. Ironically in the late 19th century, a lot of people believed that the laisser faire policy was responsible for the countries industrial growth. It was generally assumed that because business owners did not have a lot of external restrictions placed on them by the government, they could pursue their own interests, and this was what made them so successful. But in fact, many of these individuals would not have been able to meet their objective if not for government support. What is the talk mainly about? 主旨题。根据演讲中的economists, In the economic sense, laisser faire was a popular doctrine, laisser faire policy可知，演讲主要说的是laisser faire(自由放任)这一经济政策。因此，正确答案为C。

【正确答案】 B

【答案解析】[听力原文] What is the principle idea of the laisser faire policy? 细节题。根据In the economic sense, this meant that while the government should be responsible for things like maintaining peace and protecting property fights, it should not interfere with private business. 可知，laisser faire政策的基本思想是政府不应该干涉私营企业。因此，正确答案为B。