Answer: (D) Federal reserve
Step-by-step explanation:
In the united states, the federal reserve is basically created by the congress in the year 1913 for providing the financial system and also the stable monetary and it is basically refers as the central banking system.
According to the question, the federal reserve is works as the primary manager in the form of Central bank in the united state for the purpose of money supply.
The main function of the federal reserve is that it basically regulated the financial institutions and also managing the nation's economy and the interest rate. Therefore, Option (D) is correct.