Suppose that the central bank must follow a rule that requires it to increase the money supply when the price level falls and decrease the money supply when the price level rises. If the economy starts from long-run equilibrium and aggregate demand shifts right, the central bank must a. increase the money supply, which will move output back towards its long-run level. b. increase the money supply, which will move output farther from its long-run level. c. decrease the money supply, which will move output back towards its long-run level. d. decrease the money supply, which will move output farther from its long-run