In the United States,the Quantity of Money Is Determined

In the United States,the quantity of money is determined

A) entirely by commercial banks through their lending procedures.
B) entirely by the public through their willingness to hold currency.
C) primarily by the amount of gold flowing into or out of the country.
D) primarily by Congress, which legislates the amount of money to be printed by the Treasury.
E) primarily by the Federal Reserve but to some degree by the private sector.