[单项选择]

Every year, as the price of goods rises, the inflation refuses to (51) even from the high educational institutions.
In the US, according to a 2011 survey by the College Board, (52) at state universities rose by an average of 7.1 percent annually, after a year when inflation grew much less. At private schools it was up 5.9 percent. The survey which (53) more than 3,000 colleges and universities did not provide clear reasons for the continued increases. It did say that the price of goods and services at universities have risen rapidly. Some of the fastest growth has been in employee health (54) , and professional salaries.
Living expenses on campus have also (55) . At the university of Southern California student dining hall, a buffet(自助餐)meal cost $5.50 in 2010. But now it’s $9. The US government often provides (56) assistance to students’ lunch in primary and high schools, but these favorable policies
A. in 
B. to 
C. off 
D. over

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