The crowding-out effect suggests that:（）

A. expansionary fiscal policy leads to inflation.

B. restrictive fiscal policy is an effective weapon against inflation.

C. greater government deficits will drive up interest rates, thereby reducing private investment.

感染过程中最常见的表现是( )

A．病原体被清除
B．隐性感染
C．潜伏性感染
D．病原体携带状态
E．显性感染