Confirm GWD TN一道题的答案

T-3-Q3.
                

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

这是GWD-TN-11的第三题。

我认为答案E正确。但是答案表格给的是B。做了10套GWD了很少有答案说服不了我的时候。但是这次不太同意B

首先insecticides used on ordinary cotton和other crops的比较让人第一眼排除。

其次E的答案说的是这些farmers之前用大量的insecticide去杀ordinary cotton的虫子，很有可能惯性的使用slightly lower的insecticide去杀新品种的虫子。假设farmers改变惯性 从而使用significantly lower的insecticide。是不是就economically make sense了。

请选B的人指正一下。thanks

我也求证过其他国际网站，就是Ｅ，不是Ｂ，Ｂ根本就是无关选项啊