In the Short Run,because Financial Markets Respond Immediately to Interest

In the short run,because financial markets respond immediately to interest rate changes,

A) prices are very volatile.
B) the marginal product of capital always is greater than the real interest rate.
C) the marginal product of capital never deviates to the real interest rate.
D) the marginal product of capital deviates to the real interest rate.
E) investment is less volatile than output.