Why does the central bank have greater control over the monetary base than over the money​ supply? It happens because:___.
a. the money supply is influenced by the money​ multiplier, which​ is, in​ part, affected by the nonbank public.
b. the central bank can control the monetary base through the required reserve​ ratio, but has absolutely no influence on the money multiplier.
c. the money supply is influenced by bank​ reserves, which​ are, in​ part, affected by the nonbank public.
d. the central bank can control the monetary base through open market​ operations, but has absolutely no influence on the money multiplier.