Answer:
B) money supply is the correct answer.
Step-by-step explanation:
The Federal Reserve System controls the size of the money supply.
The Federal Reserve is the United States central bank that regulates inflation by maintaining credit and controls the money supply.
The Federal Reserve System as formed by congress on 23rd December in the year 1913 wants the central regulator of the financial system to alleviate monetary crises and to provide the nation safer and stable monetary system.