The following graph shows the consumer price index (CPI) for a fictional country from 1980 to 1990. Consumer Price Index (CPI) 60 1980 1982 1984 1986 1988 1990 During which of these time periods was there a period of inflation?​

A. 1986 to 1988
B. 1988 to 1990
C. 1982 to 1984
D. 1980 to 1982

The answer is C