GRE的语文的题目,求解释下裸机

GRE的语文的题目,求解释下裸机
Skeptics contend that any scheme for charging vistors to Web sites that rewards the vendor adequately would require steep prices,___the kind of frequent casual use of Web sites that surfersnow take for granted.
A.bridling
B.exciting
C.forbidding
D.inhibiting
E.provoking
F.reversing
选2个能够配得上题目意思的答案，并且能给我解释下这个题目的意思和逻辑吗？谢谢