If we look at the yearly average rate of M2 growth minus the yearly average rate of GDP growth in different decades, we see that a. from 1990 to 1999, this difference was much lower than the average inflation rate b. from 2010 to 2019, this difference was similar to the average inflation rate c. from 1970 to 1979, this difference was slightly lower than the average inflation rate d. from 2000 to 2009, this difference was much higher than the average inflation rate e. from 1980 to 1989, this difference was very close to the average inflation rate