The question asks about economical benefit, which means whether modified seed with cost more or ordinary seed. Question is not asking which kind of seeds produce more. Since the amount of insecticide used in both seeds are the same, if one of the insecticide would be cheater than the other, the cheaper one wins. So B is the best.
If you assume that both crops used the insecticide, then E would be reasonable. (I got tricked too) The passage does not mention anything about it. |