Which of the following statement about monetary policy is NOT correct ____?
A. To implement monetary policy, the Federal Reserve can change money multiplier by changing reserve-deposit ratio.
B. A central bank cannot perfectly control total money supply because consumers can decide how much money they prefer to deposit at commercial banks.
C. In the US, commercial banks cannot set up the amount of deposit as reserves beyond the required level (reserve requirement).
D. As benchmark interest rate in the US, the federal funds rate the interest rate that banks charge each other on short-term loans of reserves.