When Does the Time Inconsistency Problem Arise

Multiple Choice

When does the time inconsistency problem arise?  

A)  when attempts are made to coordinate monetary policy throughout different time zones 
B)  when there is a lag between the announcement of a monetary policy and the implementation of it 
C)  when policymakers have an incentive to mislead people about their monetary policy intentions 
D)  when policymakers do NOT allow enough time for a new policy to take effect