14. Federal agricultural programs aimed at benefiting one group whose livelihood depends on farming often end up harming another such group.
Which of the following statements provides support for the claim above?
I. An effort to help feed-grain producers resulted in higher prices for their crops, but the higher prices decreased the profits of livestock producers.
II. In order to reduce crop surpluses and increase prices, growers of certain crops were paid to leave a portion of their land idle, but the reduction was not achieved because improvements in efficiency resulted in higher production on the land in use.
III. Many farm workers were put out of work when a program meant to raise the price of grain provided grain growers with an incentive to reduce production by giving them surplus grain from government reserves.
(A) I, but not II and not III
(B) II, but not I and not III
(C) I and III, but not II
(D) II and III, but not I（C）
(E) I, II and III
答案是C,可是我对III有疑问。
benefiting one group, 从III，看不出这个program一定是benefit这些grain grower的，这个program是为了reduce production,所以提供给这些grain grower多的grain,但是这个也减少了他们的产量，一定就能保证使benefit grain grower吗？
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