请教一道逻辑题！！

richygogogo · 发表于 2016-9-21 17:53:44

40. GWD-23-Q14

Plantings of cotton bioengineered to produce its owninsecticide against bollworms, a major cause of crop failure, sustained littlebollworm damage until this year. Thisyear the plantings are being seriously damaged by bollworms. Bollworms, however, are not necessarilydeveloping resistance to the cotton’s insecticide. Bollworms breed on corn, and last year morecorn than usual was planted throughout cotton-growing regions. So it is likely that the cotton is simplybeing overwhelmed by corn-bred bollworms.

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

A. Whether corn could be bioengineered toproduce the insecticide

B. Whetherplantings of cotton that does not produce the insecticide are sufferingunusually extensive damage from bollworms this year（correct）

C. Whether other crops that have beenbioengineered to produce their own insecticide successfully resist the pestsagainst which the insecticide was to protect them

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

E. Whether there are insecticides that can beused against bollworms that have developed resistance to the insecticideproduced by the bioengineered cotton

我不明白的是D选项：如果有其他的虫子也damage cotton的话，不就削弱了结论（B虫damage cotton）；如果没有其他的虫子damage cotton的话，那不就加强了是B虫damage cotton了嘛？这个D错在了哪里？？

点点小允 · 发表于 2016-9-21 23:07:24

楼主仔细看题。题目里说的是 Thisyear the plantings are being seriously damaged by bollworms. 确定了这些damage是bollworms造成的.所以d是无关选项

请教一道逻辑题！！

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