please give explanation

29. There are two operating regimes that the Fed can choose from to conduct monetary policy: (I) one in which aggregate excess restPeashet Affriciently limited that money market interest rates are small changes in the supply of reserves and (2) one in which aggregate excess reserves are sufficiently abundant that money market interest rates are small changes in reserve supply. a. not targeted by; targeted by b. not altered in response to; changed in response to c. dampened by; amplified by d. sensitive to; not sensitive to 30. Primary dealers are a. trading counterparties of the New York Fed b. the primary suppliers of reserves to the banking system c. cash providers of the Fed Open Market Committee d. large holders of excess reserves