[求助]大家来帮忙看道prep题~~

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

答案是c，

我选的是e，理由是只有当还有市场的情况下政府fund initiatives才有用，e选项正式现在的市场limited，所以经过政府行为刺激有潜力开发

我自己觉得还挺有道理的- -|||  

请nn们指点迷津~~

嗯，对

我是这样想的，正是因为这样，所以政府采取了相应措施来扩大美国自身的市场，但是只有在市场有阔大的前提下才有被扩大的可能~~所以还是不太明白为什么e不可以额