Which of the following most logically completes the argument below?

Davison River farmers are currently deciding between planting winter wheat this fall or spring wheat next spring. Winter wheat and spring wheat are usually about equally profitable. Because of new government restrictions on the use of Davison River water for irrigation, per acre yields for winter wheat, though not for spring wheat, would be much lower than average. Therefore, planting spring wheat will be more profitable than planting winter wheat, since _____.


the smaller-than-average size of a winter wheat harvest this year would not be compensated for by higher winter wheat prices

new crops of spring wheat must be planted earlier than the time at which standing crops of winter wheat are ready to be harvested

the spring wheat that farmers in the Davison River region plant is well adapted to the soil of the region

spring wheat has uses that are different from those of winter wheat

planting spring wheat is more profitable than planting certain other crops, such as rye

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考题讲解

情景：Davison河边的农民正在考虑是秋天种冬麦还是明年春天种春麦。冬麦和春麦利润差不多。因为政府限制用Davison河水灌溉，所以，虽然春麦不受影响，冬麦的每亩收益会低于平均值很多。因此，种春麦比种冬麦利润更高。

推理：由于前提和结论讲的是两件事，并且结论是果，所以本题为因果推理。
顺序的因果逻辑：因为冬麦的每亩收益会低于平均值很多，所以种春麦比种冬麦利润更高
（因）前提：冬麦的每亩收益会低于平均值很多
（果）结论：种春麦比种冬麦利润更高

选题方式：因果推理只有一个评估方向，简而言之，即（由于本题问的是加强，所以答案选项需在“取非”后满足），反驳推理文段中的结论。

选项分析：

A选项：Correct. 今年冬麦产量的减少不能被高价所补偿。如果冬麦的价格会升高，则冬麦纵然产量少，可能利润也很高。

B选项：种春麦时间早于收获冬麦的时间。两种麦子的种植和收获时间与利润关系不大。

C选项：在Davison河种植的春麦可以很好的适应当地土壤。就算春麦不能很好的适应土壤，只要产量大，就可以让春麦的利润更高。

D选项：春麦有不同于冬麦的用途。本选项讨论的是两种植物的性质，无关于利润。

E选项：种春麦比其他作物（如裸麦）利润更高。推理文段的结论是用春麦和冬麦做比较，无关于其它的麦子。

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