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.
因果
∵天要下雨→(暗示着)谷物增产
∴谷物价格会下降
削弱
A、没有充足水分的谷物没法丰收,加强
B、未来谷物价格会波动,无关
C、天要下的雨精准覆盖种谷物的地方,加强
D、一种毁灭谷物的病毒将一直持续到丰收季节结束(暗示会减产,即价格上涨),削弱
E、未来要卖谷物的人很少实际上占有这些谷物,无关
相关因果好像更好一点,独立第三因素hhh
登录 或 注册 后可以参加讨论