The interest rate that is directly controlled by the Federal Reserve is the a. IORB (Interest On Reserve Balance Accounts).
The interest On Reserve Balance Accounts is the rate that the Fed pays to banks on the amount that the bank leaves in the Fed as reserves.
This rate is directly controlled by the Federal Reserve as it is set by the Fed's Board of Governors.
Find out more on the Interest On Reserve Balance Accounts at https://brainly.com/question/27962333.
#SPJ1