Crops can be traded on the futures market before they are harvested. If a poor corn harvest is predicted, prices of corn futures rise; if a bountiful corn harvest is predicted, prices of corn futures fall. This morning meteorologists are predicting much-needed rain for the corn-growing region starting tomorrow. Therefore, since adequate moisture is essential for the current crop's survival, prices of corn futures will fall sharply today.
Which of the following, if true, most weakens the argument above?
Corn that does not receive adequate moisture during its critical pollination stage will not produce a bountiful harvest.
Futures prices for corn have been fluctuating more dramatically this season than last season.
The rain that meteorologists predicted for tomorrow is expected to extend well beyond the corn-growing region.
Agriculture experts announced today that a disease that has devastated some of the corn crop will spread widely before the end of the growing season.
Most people who trade in corn futures rarely take physical possession of the corn they trade.
看起来好像是 相关 因果,
前提:收成差的时候价格升 收成好的时候价格降 (价格与收成成相关关系 而非雨水与价格成相关关系)
argument 要下雨了--会丰收 -
conclusion 价格降
其实D就是在斩断下雨跟不避让导致丰收 因为还有其他因素使得不能丰收 所以价格降不下
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