What does yellen mean by saying that open double quotereserves were no longer relatively scarceclose double quote? a. reserves are so large that banks have little need to borrow reserves from other banks. b. reserves are so large that banks can easily borrow reserves from other banks. c. reserves are so large that banks have little need to increase the level of their depository accounts. d. reserves are so large that banks can easily increase their lending activities. why, with the monetary policy tools it had used prior to the financial crisis, could the fed not control the federal funds rate? a. the fed would have needed to conduct a massive open market purchase of government securities. b. investor and consumer behavior was not conforming to normal patterns. c. using the tools the fed had available would have disrupted the financial system. d. reserves would have needed to be increased by too large an amount. how was the fed able to use its new monetary policy tools to increase the federal funds rate in december 2015? a. the fed raised the rate it pays on excess reserves. b. the fed raised the rate it pays on reverse purchase agreements. c. the fed established a new federal funds rate. d. the fed raised the rate it pays on excess reserves and reverse purchase agreements.