Final answer:
The aspects of the economy directly controlled by the Fed are the money supply and interest rates.
Step-by-step explanation:
The aspects of the economy that are directly controlled by the Fed are:
C. Money supply - The Federal Reserve has the power to increase or decrease the money supply through their monetary policy actions, such as buying or selling government bonds through open-market operations.
D. Interest rates - The Federal Reserve can influence interest rates, specifically the federal funds rate, by engaging in operations to nudge the rate up or down.