新PREP13

Which of the following most logically completes the argument?

United States manufacturers currently produce most of the world's solar-power generators--most of which are exported to Europe.  However, European manufacturers are emerging and probably will ultimately capture much of the European market.  The United States government is funding initiatives intended to encourage use of solar power within the United States.  If these initiatives succeed in increasing the demand for solar-power generators in the United States, United States manufacturers will probably maintain significant production levels, since __________.

(A) some United States manufacturers have been substantially increasing their output over the last several years

(B) the efficiency of solar-power generators in converting energy from the Sun into electric power is not improving as fast as it once did

(C) just as European manufacturers enjoy certain competitive advantages in Europe, so do United States manufacturers in the United States

(D) European governments are currently undertaking initiatives to stimulate the use of solar power within Europe

(E) the current market for solar-power generators in the United States is very limited

为什么是C，不是E？？

E的意思太窄，关键是和题目不“吻合”——没有提到欧洲的情况，尽管美国市场不发达，但如果欧洲人来抢占呢？

C的意思和题目是完全一致的，题目暗含了一个意思就是欧洲制造商对自己的市场有一定优势，那么美国如果想对自己本土市场保持一定的产量和销售，前提就是“一定的优势”——和欧洲一样的

文中的reasoning是: 失去了部分欧洲市场, 同时开拓了自有的国土市场---->maintain productivity

but E, 如果现有的自有市场本身有限, 将无法弥补失去的欧洲市场.所以它不能作为原因解释

C的理解完全赞同rio