Answer:
A) To cut the interest rate from 2% to 1.5%, the Federal Reserve needs to increase the money supply. The Open Market Committee will have to sell US Treasury security bonds in order to increase the money supply. This in turn will increase commercial bank's reserves, who in turn, will lower their interest rates in other to get rid of excess reserves.
B) Banks will lend more money because they now have excess reserves. It will increase the nation's money supply because banks create money when they make loans.
C) This will typically increase aggregate demand because a lower interest rate and cheaper loans result in a higher demand for financial securities. Firms will take more loans, they will use this loans for investments, and this investments will in turn increase production. Increased production means a higher supply of goods and services at a better price, and consumers will take advantage of it.