A state of hyperinflation is one in which prices are rising very quickly, any period during which the inflation rate is decreasing, hence option b is correct.
Typically, the rate of price increases is uncontrollable during hyperinflationary periods.
Period of deflation their actions lessen liquidity, which lowers the amount of money that firms and people have available to spend.
Therefore, considered contractionary during which the inflation rate is decreasing, hence option b is correct.
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