Keynesian Theorists Argue That Any Increase in the Money Supply

Keynesian theorists argue that any increase in the money supply

A) is effective in increasing GDP only if it causes an outward shift of the aggregate supply curve.
B) will increase GDP only if interest rates fall and investment is sensitive to decreasing interest rates.
C) causes velocity to increase,and so in the short run nominal output must increase.
D) will move the economy from the "liquidity trap" during times of recession if interest rates fall enough to stimulate private investment.