求助，xdf补充250题 - 2

找了讨论发现没有这道题，可能是太简单了，可是我想了半天还没想明白，恳请各位牛牛赐教，谢谢！

250-2

2.     Child prodigies are marked not so much by their skills but instead by the fact that these skills are fully developed at a very early age.

(A) but instead

(B) rather than

(C) than

(D) as

(E) so much as

答案是(d)，我选的是（a），我觉得是not...but...结构，请各位指教！

but instead is wordy.

not so much ...as... is a good structure.

谢谢两位热心人！