Answer:
a. OMOs are the selling and buying of government securities. The money supply increases when purchasing occurs and contracts when selling occurs. OMOs work by changing the amount of excess reserves available in the banking system.
Explanation:
OMOs are open market operations and refer to the purchase and sale of government securities by the Federal Reserve Bank (Fed) in an effort to change the money supply. If the Fed wants to increase the money supply, it will purchase government securities. The Fed buys the securities and pays for them by increasing the selling banks' reserves in their account at the Fed. The increase in reserves will increase the amount of excess reserves in the banking system and fuel deposit expansion, assuming the bank wishes to keep excess reserves at a minimum.