C
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. Ttherefore, 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?
A: Most people who trade in corn futures rarely take physical possession of the corn they trade.
B: Futures prices for corn have been fluctuating more dramatically this season than last season.
C: 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.
D: Corn that does not receive adequate moisture during its critical pollination stage will not produce a bountiful harvest.