The sick man's allowed to take a walk in the garden every day, ______? [ ]

A. is he

B. isn't he

C. has he

D. hasn't he

紧的货币政策主要通过( )来实现。

A．减少税收或扩大支出规模来增加社会总需求
B．降低法定准备金率、利息率等来扩大信贷规模，增加货币供给
C．增加税收、削减政府支出规模等，来限制消费与投资，抑制社会总需求
D．提高法定准备金率、利率等来增加储蓄，减少货币供给，抑制社会投资、消费需求