US Economic Data from 1955 to 2009 Give Evidence of

U.S. economic data from 1955 to 2009 give evidence of

A) a positive relationship between the unemployment rate and inflation.
B) a negative relationship between the unemployment rate and inflation.
C) a constant rate of unemployment with changing rates of inflation.
D) a constant rate of inflation with changing rates of unemployment.
E) no particular relationship between the unemployment rate and inflation.