PREP3语法28，没有人问吗

小皮球PAL

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

我看有个解释是说not so much that… as that…的意思是与其说…不如说…，真的有这个意思吗？
如果有的话，整句话的意思是狗品种基因的变异与其说是为了欣赏或满足些narrow criteria的目的，不如说是这个品种缺少founding members。在句中not so much that~~~~as that引导的两个句子怎么平行了？前面说的是狗品种基因变异的原因，后面说的是品种，怎么平行了？

小皮球PAL

求解

DUKB24

两者都是基因变异的原因

仔细再读读，不过后者是解释genetic irregularities的主导原因