GWD有一题想不明白

typhoon_wang

7.GWD24
Plant scientists have been able to genetically engineer vegetable seeds to produce crops that are highly resistant to insect damage. Although these seeds currently cost more than conventional seeds, their cost is likely to decline. Moreover, farmers planting them can use far less pesticide, and most consumers prefer vegetables grown with less pesticide, therefore, for crops for which these seeds can be developed, their use is likely to become the norm.

Engineer=设计，策划

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

A.Whether plant scientists have developed insect-resistant seeds for every 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 from the new genetically engineered seeds can be kept completely free of insect damage.，

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

E. Whether most varieties of crops currently grown commercially have greater natural resistance to insect damage than did similar varieties in the past.

在LAWYER的分类中  她选的是D    但是我觉得选C

我本人的理由是,如果不是if after using the new seeds to plant crops which are completely free of insect damage, then is will help to support the argument. and if it does work, farmer dont have to use pesticide which meet the consumenrs' need because consumers prefer vegetables grown with less pesticide.

how about your guys ideas?

shirleyon

答案选B
http://forum.chasedream.com/GMAT_CR/thread-488304-1-1.html?postid=14379783&searchmode=TopicContent&searchtext=scientists%20resistant

wenyuanalive

选D
C：题目中已经说 highly resistant to insect damage了，题干说是否completely free of insect damage，这对profit没有太大影响

D：如果引进新型crop，pestiside的费用是少了（不用跟以前一样用足够的pestiside杀虫），但是产量减少了，那不就得不偿失了嘛！

mousealpha

我是这么想的。。

c和d各对应了原文里的一些信息。。要推广这个新种子有两个问题：cost和pesticide。。

d对应原文应该是cost的问题，产量如果特别小成本就太高，就没人愿意使用新种子了，但是由于种子已经是highly insect resistant，无论能不能完全抗虫，都满足减少pesticide的要求。。

c对应pesticide的问题。。但我觉得c是说free of insect damage，等于是完全不用pesticide，原文说农民和消费者希望的是减少pesticide的使用，没有说希望彻底不用pesticide。。所以我觉得c就不合适了。。

楼下继续。。