单选题 Which of the following statements best explains the importance of the timing of changes in discretionary fiscal policy? Changes in discretionary fiscal policy must be timed properly if they are going to:

A. help the government achieve a balanced budget.
B. exert a stabilizing influence on an economy.
C. enable the government to control the money supply.

【正确答案】 B

【答案解析】Proper timing of discretional policy is needed to reduce economic instability. If timed incorrectly, the fiscal policy change could increase rather than reduce economic instability.