GWD 24 29 老题扒出来求各位指教

Plant scientists have been able to genetically engineer vegetable seeds to produce crops that are highly resistant to insectdamage. Although these seeds currentlycost more than conventional seeds, their cost is likely to decline. Moreover,farmers planting them can use far less pesticide, and most consumers prefervegetables grown with less pesticide, therefore,for crops for which these seeds can be developed, their use is likely to becomethe norm.

Which of the following would be most useful to know in evaluating the argument above?

A.     Whether plant scientistshave developed insect-resistant seeds forevery crop that is currently grown commercially

B.     Whether farmers typically use agricultural pesticides in larger amounts than is necessary to prevent crop damage.

C.     Whether plants grown fromthe new genetically engineered seeds canbe kept completely free of insect damage.

D.     Whether seeds genetically engineered to produce insect-resistant crops generate significantly lower per acre cropyields than do currently used seeds.

E.     Whether most varieties ofcrops currently grown commercially have greater natural resistance to insect damage than didsimilar varieties in the past.

搜了论坛一圈，大家普遍同意D，但也对B项有争议。说时候自己的想法，求NN们指点：

题干：New seeds: cost less and people prefer

         Old seeds: cost more because of pesticides

结论：到底要不要种？

B： 农民们通常用的杀虫剂其实比需要的多很多-----引申义为没改良过的种子成本高是因为用的杀虫剂太多了----但因为大家喜欢杀虫剂用的少的作物----到底能不能推广？

D：改良过的种子的产量是不是比之前低？---无法直接引申出内容。

因此，我觉得B项更好。原因：

D：虽然大家通常觉得产量少农民就不喜欢种，但这个完完全全是推论，题干并没有给任何农民对于产量的concern。况且产量低农民就不种了么？文章有提到说杀虫剂用得少的作物更受大家欢迎，那是不是说这种作物卖的更好呢？即使产量低太低，只要卖的价格够高，农民还是会去种的。

B：明确和题干的紧密联系，就是说成本高是因为杀虫剂用的多，那也就是说农民们不应该用这么多杀虫剂，不用这么多杀虫剂就能推出cost会降低，而且作物也会更受欢迎因为大家就是不喜欢杀虫剂多的产品。和题干联系非常紧密。

求给位NN指教！！谢谢谢谢！！看是不是哪里思路出问题了。。。。。