Insect infestations in certain cotton-growing regions of the world have caused dramatic increases in the price of cotton on the world market. By contrast, the price of soybeans has long remained stable. Knowing that cotton plants mature quickly, many soybean growers in Ortovia plan to cease growing soybeans and begin raising cotton instead, therby taking advantage of the high price of cotton to increase their income significantly, at least over the next several years.
Which of the following, if true, most seriously weakens the plan’s chances for success?
A The cost of raising soybeans has increased significantly over the past several years and is expected to continue to climb.
B Tests of a newly developed, inexpensive pesticide have shown it to be both environmentally safe and effective against the insects that have infested cotton crops.
C In the past several years, there has been no sharp increase in the demand for cotton and for goods made out of cotton.
D Few consumers would be willing to pay significantly higher prices for cotton goods than they are now paying.
E The species of insect that has infested cotton plants has never been known to atack soybean plants
正确答案是B
我选的是C
我觉得不能理解B
谢谢斑斑，
其实这题我应该发在逻辑区的。
我突然想明白了，这题有个转弯，
effective pesticide----less infestation----high yield of cotton-----no high price of cotton---less chance to increase income
想请问斑斑，这种逻辑题，也要进行比较选择，但是考试时间那么短，怎么办
同问C的错误。
我觉得C说过去的几年消费者对棉花的需求都没有明显增加。那么如果农民们种了棉花，供给增加，需求不变，造成价格下降，不是也会造成总收入下降么？
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