og12 cr 47 填空题 春小麦冬小麦题

cuson

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??????.


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

B.new crops of spring wheat must be planted earlier than the time at which standing crops of winter wheat are ready to be harvested
C.the spring wheat that farmers in the Davison River
region plant is well adapted to the soil of the region
D.spring wheat has uses that are different from those of winter wheat
E.planting spring wheat is more profitable than planting certain other crops, such as rye

这个题是个什么意思，我感觉我没怎么读懂题，求求各位帮忙看看，谢谢谢谢谢谢

Gail小M

Winter wheat and spring wheat are usually about equally profitable

however, this year per acre yields for winter wheat would be much lower than average

if U want to get the conclusion that  planting spring wheat will be more profitable than planting winter wheat, U have to make sure that the  higher winter wheat prices( in general, when the quantity is low, the price of this good will increases) will not compensate smaller-than-average size of a winter wheat harvest .

since : price* yields=profit  
if the price is high enough this year to compensate the lower yields, thus the conclusion is not valid.