问题详情

According to the author, the trouble for the technological advances of America is that ______.
A．their enemies can quickly imitate their weapons
B．their allies are unable to produce the same kind of weapons
C．many other countries are not financially capable of producing weapons that are in line with American weapons
D．their enemies may come up with other dangerous weapons请帮忙给出正确答案和分析，谢谢！