987-961 SO THAT 和 ENOUGH 的区别

1.                             ?987-961     Consumer confidence levels, which many economists consider an early indication of the economy’s direction, sagged as the stock market tumbled, but not dramatically enough for giving a clear picture of new spending patterns.fficeffice" />

(A) tumbled, but not dramatically enough for giving

(B) tumbled, but not dramatically enough to give

(C) tumbled, and not so dramatically as to have given

(D) has tumbled, and not dramatically enough to give（B）

(E) has tumbled, but not so dramatically as to give

这里为什么要用ENOUGH                     TO    呢,ETS不是倾向用SO     THAT吗,何况这里也不是要强调主观看法啊    

E. so as to 应该优先于 enough to ...  

但是否因为has 的原因不选E？

现在完成时好像的却不妥。请大侠指正。