Which of the following is true?

a) By the 1990s, Australia governments and their policy advisors both agreed that inflation could be reduced painlessly.

b) By the 1990s, neither Australia governments nor their policy advisors agreed that inflation could be reduced painlessly.

c) By the 1990s, Australia governments believed that inflation could be reduced painlessly, but policymakers disagreed.

d) By the 1990s, Australia policymakers believed that inflation could be reduced painlessly, but government disagreed.