The role of the Federal Open Market Committee (FOMC) primarily involves managing the nation’s money supply. Therefore, the correct response is:
managing the nation’s money supply.
While the FOMC does influence the discount rate and reserve requirements through its decisions, it is not directly responsible for setting those rates — that responsibility lies with the Board of Governors. The FOMC also does not appoint members to the Board of Governors or collect economic information for each district, though it does consider economic conditions in its decision-making.