58. Some people say that the scarcity of food is a function of the finite limits of the earth’s resources, coupled with a relentless rate of population growth. This analysis fails to recognize, however, that much of the world’s agricultural resources are used to feed livestock instead of people. In the United States, for example, almost one-half of the agricultural acreage is devoted to crops fed to livestock. A steer reduces twenty-one pounds of inexpensive grain to one pound of expensive meat. Thus, the scarcity of food is not merely a function of limited resources and population growth.
Which one of the following is an assumption that would allow the conclusion in the argument to be properly drawn?
A. People prefer eating meat to eating grain.
B. Meat is twenty-one times more expensive than grain.
C. The limits of the earth’s agricultural resources are not finite.
D. More than one-half of the agricultural acreage in the United States is devoted to drops fed to humans.
E Growing crops for human consumption on the acreage currently devoted to crops for livestock will yield more food for more people.
这道题目答案选E，可是我觉得题目的conclusion 是the scarcity of food is not merely a function of limited resources and population growth. 是问假设，E分明是削弱了题目，因为即使部分crop是给livestock，但是最终还是人类消耗了livestock，这不刚好反驳了结论？
纠结了好久，希望大家帮帮解决一下 | 
