郁闷 40题这是什么意思啊

beMe

40.(26538-!-item-!-188;#058&003184)

According to one expert, the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria as that the breeds have relatively few founding members.

(A) the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria

(B) the cause of genetic irregularities in many breeds of dog is not as much their being bred for looks or meeting other narrow criteria as much

(C) it is not so much the cause of genetic irregularities in many breeds of dog that they are being bred for looks or meeting other narrow criteria as much

(D) it is not so much that the cause of genetic irregularities in many breeds of dog is their being bred for looks or meeting other narrow criteria so much

(E) it is not so much the cause of genetic irregularities in many breeds of dog to be bred for looks or to meet other narrow criteria

不理解句意啊，不知道怎么改。。答案是A
高手们能翻译下不

LeoBX

句子的主架是the cause is not so much that...as that...
两个that引导名词性从句，也就是两个“cause”，句意为： 据专家称，导致一些种类的狗基因紊乱的原因，更多的是因为他们确守少足够的可以交配的对象，而不是人们为了追求狗的外表或满足其他标准而让他们繁殖。