PREP 语法一道，求教！

LienHan

The success of the program to eradicate smallpox has stimulated experts to pursue what they had not previously considered possible--better control, if not eradication, of the other infections such as measles and yaws.



(A) what they had not previously considered possible--better control, if not eradication, of the other infections such as

(B) what they had not previously considered a possibility--better control, if not eradication, of such infections like

(C) something they had not previously considered possible-better control, if not eradication, of such infections as

(D) something not considered a previous possibility--better control and perhaps eradication, of other infections such as

(E) the possibility of what they had not previously considered--better control and possibly eradication of infections like



在A,C中纠结了很久，smallpox应该也属于“they had not previously considered possible”的范围吧，为什么正确答案里没有排除？A哪里错了？
望有牛牛路过给出正解！万谢！！

powers

记得og上有提过用what不好..所以我基本看见what就排除.

LienHan

那么关于“the other” 的用法这里有什么特别的讲究吗？纠结。。。