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?
- Whether corn (无关)could be bioengineered to produce the insecticide
- Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
- 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
- Whether plantings of bioengineered cotton are frequently damaged by insect pests other than （无关） bollworms
- 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 | 
