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.
因:充足的湿度是玉米生长的必要条件;
果:玉米价格今天将会显著下降(注意today)。
A:那些在授粉阶段不能承受充足湿度的玉米品种将减产,这意味着两种可能情况:1.还有在授粉阶段能承受充足湿度的玉米品种则不会减产,因此整体玉米丰收还是减产就无法判断了。2.即使减产了也不能表明(今天)的价格就会上升(主语结论中说的是today)
D:专家今天宣布(注意today)疾病已经影响到玉米且将会广泛的传播,暗示整体玉米将会减产,直接否定了文章的结论。
懂了谢谢
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