凯恩斯学派主张货币政策传导过程中的主要环节是( )

A．汇率

B．货币供应量

C．基础货币

D．利率

The number of  the workers in this factory     300, that is to say,

it       20%.

A．has increased by; has increased to

B．have increased to; have increased by

C．has increased to; has increased by

D．have increased by; have increased to