Which of the Following Best Describes the Reason Why Policymakers

Which of the following best describes the reason why policymakers do not generally like to commit to following a rule for monetary policy?

A) Because changes to the economy's structure will prevent any rule from working well for long
B) Because rules do not effectively prevent time-inconsistency
C) Because rules without credibility are worse than discretion
D) Because central bankers like to feel important