In the United States Between 1971 and 2011, the Inflation

In the United States between 1971 and 2011, the inflation rate

A) increased every year.
B) only decreased during the late 1990s.
C) only increased during the late 1970s and 1980.
D) peaked during the late 1970s and 1980 and was at its generally lowest in the 1990s and 2000s.
E) has been relatively constant at approximately 4 percent to 6 percent per year.