WHy is it the Federal' responsibility to set interest rates, not national banks?

A. The Fed is responsible for printing all money.
B. There are not very many national banks, so few are quilified.
C. The Fed consults national banks, but they do not make the final decisions.
D. National banks are for profit, so they are not looking at the overall economy.

D. National banks are for profit, so they are not looking at the overall economy.