which one of the following statements is false? select one: a. when the fed sells bonds, contractionary monetary policy, it tends to increase the money supply growth rate. b. the prime bank rate is the rate banks charge their most credit-worthy commercial customers. c. the fed does not directly set the federal funds rate but instead tightly controls the rate through open market operations. d. the fed can influence the supply of federal funds through open market operations. e. the prime bank rate in the united states is consistently higher than the federal funds rate.