A change in the level of the supply of money

a. Has no effect on the long-run values of the interest rate and long-run values of real output
b. Has no effect on the long-run values of real output but may affect the long-run interest rate
c. Has no effect on the long-run values of the interest rate but may affect long-run values of real output
d. Decreases the long-run values of the interest rate and real output
e. Increases the long-run values of the interest rate and real output