大全2—8，非常想不通，请高手指点

mingming8152

Current farm policy is institutionalized penalization of consumers.
                It increases food prices for middle- and low-income families and costs the taxpayer billions of dollars a year.

Which of the following statements, if true, would provide support for the author’s claims above?

I.     Farm subsidies amount to roughly $20 billion a year in federal payouts and $12 billion more in higher food prices.

II.    According to a study by the Department of Agriculture, each $1 of benefits provided to farmers for ethanol production costs consumers and taxpayers $4.

III.   The average full-time farmers have an average net worth of over $300,000.

(A) I only

(B) II only

(C) III only

(D) I and II only

(E) I, II, and III

这题怎么考虑啊，望高手指点

mingming8152

没人理啊