prep SC p1-74

[autumn713]

74. (28503-!-item-!-188;#058&003635)

Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored due to their enhancement of reproduction or survival, but that they are simply random by-products of other evolutionary developments.

(A) due to their enhancement of reproduction or survival, but that they are
(B) due to the reproduction or survival they enhance, but they are
(C) because they enhance reproduction or survival, but
(D) because they enhance reproduction or survival, but are
(E) because of enhancing reproduction or survival, but are


The answer is D, but I choose C.
The reason why I think C is better than D is because xxx are not A, but B...while the "are" before B shold be able to be omitted.
If so, the seems like C is better than D??

is there someone who can answer the question for me?
Thanks a lot.

[dibert8]

其實只要自己'頂'一下回應,問題就一直會在 SC考區的第一頁.這樣問題就一直會被注意到了.

[dibert8]

這個主題被鎖住了.
回應請參考: http://www.formosamba.com/phpBB3/viewtopic.php?t=26071