The major advantage of automatic stabilizers is that:（）

A. they institute crowding out policy without the delays associated with policy changes that require legislative action.

B. they institute countercyclical fiscal policy without the delays associated with policy changes that require legislative action.

C. they institute cyclical fiscal policy without the delays associated with policy changes that require legislative action.

耦合性和内聚性是对模块独立性度量的两个标准。下列叙述中正确的是______。

A) 提高耦合性、降低内聚性有利于提高模块的独立性
B) 降低耦合性、提高内聚性有利于提高模块的独立性
C) 耦合性是指一个模块内部各个元素间彼此结合的紧密程度
D) 内聚性是指模块间互相连接的紧密程度