Some farmers have recently begun planting cotton grown from genetically modified seed designed to increase resistance to insect pests. Compared with farmers using ordinary seed, those using the modified seed required only slightly less insecticide per acre to control pests. The modified seed, however, costs more per acre than ordinary seed. On the basis of these facts, some analysts conclude that switching to the modified seed would be unlikely to benefit most cotton farmers economically.
Which of the following, if true, would most seriously weaken the analysts’ conclusion?
A. Many of the farmers who tried the modified seed had previously grown other crops using genetically modified seed.
B. The insecticides typically used on ordinary cotton are substantially more expensive per unit than those typically used on other crops.
C. For most cotton farmers, cotton accounts for the largest share of their total farm revenue.
D. Farmers who tried the modified seed planted approximately the same average acreage of cotton as farmers who used ordinary seed.
E. Farmers who tried the modified seed had previously spent significantly more per acre on insecticides than most farmers using ordinary seed.
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