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.
答案：B。为啥我觉得E很好呢？请nn帮忙讲讲哦：）
新种子用杀虫剂用量只是比一般种子略少 新种子更贵 所以 农民不会换新种子
这里面有个很明显的逻辑漏洞 杀虫剂用量虽然只是略少 但不同的杀虫剂是不是价格也差不多呢
所以要判断不同杀虫剂的价格差 才能判断农民会不会换种子
但是B我也觉得不太对
Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops.（这里我觉得换成modified seed才更严谨）
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