Which of the following is correct?

a. If Bank of Canada purchases bonds in the open market, then the money supply shifts right.

A change in the price level does not shift money supply.

b. If Bank of Canada sells bonds in the open market, then money supply shifts right. A

change in the price level does not shift money supply.

c. If Bank of Canada purchases bonds, then the money supply shifts right. An increase in the

price level shifts money supply right.

d. If Bank of Canada purchases bonds, then the money supply shifts right. A decrease in the

price level shifts money supply right.