Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to
farmers’ report, the amount of insecticide needed per acre to control insect pests was only slightly lower
for those who tried the modified seed than for those who did not. Therefore, since the modified seed
costs more than ordinary seed without producing yields of higher market value, switching to the modified
seed would be unlikely to benefit most cotton farmers economically.
Which of the following would it be most useful to know in order to evaluate the argument?
A. Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed.
B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops.
C. Whether for most farms who grow cotton it is their primary crop
D. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did.
E. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide.
Why is B?
The answer is wrong?
个人认为答案是E
有人认为是B，但我认为B很明显已经跑题了，扯到其他crop上了
D的推理过程太多了，推理的东西太多了
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