the central bank decides to increase the money supply by $500 million in the economy by decreasing the discount rate to 4%. which of the following is true about the nominal interest rate in the economy? the nominal interest rate remains unaffected. the nominal interest rate will increase by the percentage change in the discount rate. the nominal interest rate will fall. the nominal interest rate will fall to create surplus in the money market. the nominal interest rate will rise by the percentage change in the discount rate.