gigi 13 31题

Q31:

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‗‗‗‗‗‗.

1. the smaller-than-average size of a winter wheat
        harvest this year would not be compensated for by higher winter wheat
        prices
2. new
        crops of spring wheat must be planted earlier than the time at which
        standing crops of winter wheat are ready to be harvested
3. the
        spring wheat that farmers in the Davison
                   River
        region plant is well adapted to the soil of the region
4. spring
        wheat has uses that are different from those of winter wheat
5. planting
        spring wheat is more profitable than planting certain other crops, such as
        rye

利润来自产量与单价，冬小麦现在由于灌溉原因产量下降，如果单价不提高，即不能弥补产量的下降，所以种植冬小麦不划算。

可能会觉得题目也没提春小麦的单价没下降，没必要提冬小麦价格是否变化，单凭产量就可比出profit

但是其他说的都跟产量没关系，所以也只有A了