[求助]求教下面的题

After a few weeks’ experience, apprentice jewelers can usually begin to discriminate, though not with absolute certainty, genuine diamonds from imitation diamonds.

(A) genuine diamonds from imitation diamonds

(B) genuine diamonds apart from imitations

(C) between genuine diamonds and imitation diamonds

(D) among genuine diamonds and imitation diamonds

(E) whether diamonds are imitation or genuine

答案是c，a为何不对？我查了字典，between和from都可以用，请问大虾这两个有何不同？谢谢！

我的理解是。。。。。。

discriminate between 指区别同类中的不同。比如真钻石和仿钻石其实都是“冠以钻石：区别是真假。

discriminate from 至两类不同的区别。

比如，区别什么是事实，什么是意见，应该是不同的。

differentiate
discriminate between
Newborn babies can discriminate between a man's and a woman's voice.
discriminate something from something
the process of learning to discriminate fact from opinion