In an Effort to Improve the Central Bank's Credibility in Fighting

In an effort to improve the central bank's credibility in fighting inflation, the central bank in New Zealand:

A) has been releasing incorrect information about the true inflation that the economy has been experiencing.
B) has been operating under a law that specifies that its only goal is to maintain stable prices.
C) has been running advertisements on the television pledging their credibility.
D) no longer issues currency and uses the Australian dollar to conduct open market operations.