Assuming the reserve requirement is 20 percent and commercial banks have no excess reserves initially, the commercial banking system could increase the money supply by a maximum of $1,000,000 if the Federal Reserve Banks would a) buy $250,000 of securities from commercial banks. b) sell $1,000,000 of securities to commercial banks. c) buy $1,000,000 of securities from commercial banks. d) buy $200,000 of securities from commercial banks. e) sell $200,000 of securities to commercial banks.