各位老师好，

Crises in international diplomacy do not always result from malice; for nations, like individuals, can find themselves locked into difficult positions, unable to back down.

A. do not always results from malice; for nations, like individuals, can find
C. do not always results from malice; nations, such as individuals, can find

老师，按照GMAT的规则，分号前后应该是两个完整的句子。可是①为什么这里选择A呢？选择A不就不是完整句子了吗？②for nations，这个for是什么作用呢？

感谢各位老师的解答！

题目来源：GMAT