A. central bank bases its long-run strategy for achieving price stability on targeting the growth rate of the money supply to equal the difference between the 10-year average growth rate of real GDP and the 4-yearaverage growth rate in the velocity of money. The bank also attempts to reduce the magnitude of business cycles. When the bank’s governing board perceives a significant difference between actual real GDP and full-employment real GDP, they adjust the money supply in the countercyclical direction: Which type of monetary policy is the Central bank following（）
A. Fixed-rule.
B. Discretionary.
C. New Keynesian feedback rule.
