GWD-16-40答案理解很奇怪

这个体的前提条件明明说了Plantings of cotton bioengineered to produce its own insecticide against bollworms，

但是给的答案却说
                        Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year，感觉很不相干。哪位NN给解释一下。

40. GWD-23-Q14

Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.  This year the plantings are being seriously damaged by bollworms.  Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide.  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.  So it is likely that the cotton is simply being overwhelmed覆盖，征服 by corn-bred bollworms.

In evaluating the argument, which of the following would be most useful to establish?

A.      Whether corn could be bioengineered to produce the insecticide

B.      Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year

C.      Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them

D.      Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms

E.      Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton

从题目：基因改良后的cotton可以抵御bollworm，但今年却受了大灾，而原来的bollworm并没有产生抗体

推出：不是原来的bollworm造成的损失

从题目：今年corn大量种植，且有一种吃corn的bollworm，

希望推出：是这种吃corn的bollworm吃了cotton

B通过指出普通cotton受到比原来更严重的损失建立了桥梁（说明是这种吃corn的bollworm吃了cotton）

谢谢leogm,理解了