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 by corn-bred bollworms.

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

1. Whether corn could be bioengineered to produce the insecticide
2. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
3. Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them
4. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms
5. Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton

大家帮忙看看分析下啊，我已经昏了，看不出个所以然来，只是觉得B相关

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 by corn-bred bollworms.

本题要evaluate这个claim对不对。

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

1. Whether corn (无关)could be bioengineered to produce the insecticide
2. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
3. Whether other crops （无关） that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them
4. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than （无关） bollworms
5. Whether there are insecticides that can be used against bollworms（无关）that have developed resistance to the insecticide produced by the bioengineered cotton

B说 看看那些非基因工程的棉花是不是受到了超多的虫害。

YES －》 看来那个玉米影响比较大

NO  －》 看来是虫子已经进化了抗药性了

引用一个牛人的解释：

这题说， 棉花有抵制那个虫子的anti
但是还是受害了，因为玉米是虫子变得很多
这样的话，也就是说有两个结论
玉米是棉花受害，棉花本身的anti有用
B说的是，如果棉花没有anti的话，虫子会不会对他造成极大伤害
这样，如果是， 说明anti有用， 如果不是，说明anti没用 于是， 按照原文的意思就是， 如果是，原文成立， 如果不是，原文不成立

这个题的中心是棉花的anti是自己没用呢？还是被corn给盖过了
所以要evaluate他，就要看那些没有anti的棉花是不是遭受了更大的伤害