小蓝第14题。。,federal agriculture program ~~望高人指点！！

Jolie881209

14,federal agriculture program aim at benefiting one group whose livelihood depends on farming often end up harming another such group.
which of the following statement provides support for the claim above?
1, an effort to help feed-grain producers resulted in higher prices for their crops, but the higher prices decresed the profits of livestock producers.
2,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 improvement in efficiency resulted in higher peoduction on the land in use.
3,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 then surplus grain from government reserves.
A,1,but not 2,3
B,2, but not1,3
C,1,2,but not 3
D,2,3,but not 1
E,1,2 and 3
不理解啊~~哪位高人指点下~！！

sdcar2010

C has typos.  It should read as C) 1,3 bt not 2

his is simple, in case 2, ONLY one group is involved instead of two groups.  So case 2 is not a strengthener.  Both cases 1 and 3 are strentheners since the policies benefiting one group hurt another group.  C is the answer.