The Long-Run Phillips Curve Is a

The long-run Phillips curve is a

A) horizontal line indicating a positive relationship between inflation and unemployment.
B) straight line with a 45 degree slope showing the long-run relationship between the inflation rate and the expected inflation rate.
C) vertical line indicating a positive relationship between inflation and unemployment.
D) vertical line that shows the relationship between inflation and unemployment when the economy is at full employment.
E) horizontal line that shows the relationship between inflation and unemployment when the economy is at full employment.