Final answer:
The correct statement concerning the history of U.S. inflation is that inflation in the 1970s was above the average over the last 80 years.
Step-by-step explanation:
The correct statement concerning the history of U.S. inflation is (c) Inflation in the 1970s was below the average over the last 80 years. This statement is not correct because inflation in the 1970s was actually above the average over the last 80 years.
According to historical data, the U.S. experienced high inflation in the 1970s, which was one of the periods of highest inflation in the twentieth century.
Deflation means a decrease in the general price level or negative inflation. In the U.S., there were periods of deflation in the first half of the twentieth century and even in 2009 during the global financial crisis.