答案是A,是否因为这是唯一的一个提到直接与profit相关的？
Which of the following most logically completes the argument?
A new machine for harvesting corn will allow rows to be planted only fifteen inches apart, instead of the usual thirty inches. Corn planted this closely will produce lower yields per plant. Nevertheless, the new machine will allow corn growers to double their profits per acre because __________.(A)
(A) with the closer spacing of the rows, the growing corn plants will quickly form a dense canopy of leaves, which will, by shading the ground, minimize the need for costly weed control and irrigation
(B) with the closer spacing of the rows, corn plants will be forced to grow taller because of increased competition for sunlight from neighboring corn plants
(C) with the larger number of plants growing per acre, more fertilizer will be required
(D) with the spacing between rows cut by half, the number of plants grown per acre will almost double
(E) with the closer spacing of the rows, the acreage on which corn is planted will be utilized much more intensively than it was before, requiring more frequent fallow years in which corn fields are left unplanted
兄弟的疑问因该在D吧
文章中说了，虽然单位种植数量增加1倍，但是每株的产量确是减少的！
B：无关
C：增加了成本
E：更是得不偿失
A：虽然不能直接推出2倍的关系，但是minimize the need for costly weed control and irrigation！所以，权衡一下，选A！
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