GMAT培训 每日一题-逻辑第51题

Rye sown in the fall and plowed into the soil in early spring leaves a residue that is highly effective at controlling broad-leaved weeds, but unfortunately for only about forty-fve days. No major agricultural crop matures from seed in as little as forty-five days.

Synthetic herbicides, on the other hand, although not any longer-lasting, can be reapplied as the crop grows. Clearly, therefore, for major agricultural crops, plowing rye into the soil can play no part in effective weed control.

The argument is most vulnerable to the objection that it fails to

(A) consider that there might be minor, quick- growing crops that do mature in forty-five days or less

(B)identify any alternative method of weed control that could be used instead of the method it rejects

(C)distinguish among the various kinds of synthetic herbicides 

(D)allow for the possibility of combining the two weed-control methods it mentions

(E)allow for the possibility that plants other than rye, handled the same way, might have the same effect

题目分析：文章探讨的就是控制野草的两种方法哪个更有效，五个选项中围绕这两个方法谈的只有D。比较简单。