In the united states, the money supply is determined: a) only by the fed. b) only by the behavior of individuals who hold money and of banks in which money is held. c) jointly by the fed and by the behavior of individuals who hold money and of banks in which money is held. d) according to a constant-growth-rate rule.

Joint by the FED and by the behavior of individuals who hold money and of banks which money is held.

Explanation: The Federal Reserve System, often referred as the Federal reserve or simply "the fed", is the central bank of the united states. It was created by the congress to provide the nation with a safer, more flexible, and more stable monetary and financial system. The FED was created on December 23, 1913, when president Woodrow Wilson signed the FEDERAL RESERVE ACT into law. The Fed and the behavior of individuals not only define how much money are available, they can also define macroeconomic indicators like inflation.

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