The​ long-run Phillips curve is a vertical line because

A.real GDP does not depend on the unemployment rate.
B.in the long​ run, the natural unemployment rate increases when inflation increases.
C.the natural unemployment rate only depends on the inflation rate.
D.the unemployment rate decreases when the inflation rate increases.
E.there is no relationship between the natural unemployment rate and the inflation rate.

ANSWER:

E.there is no relationship between the natural unemployment rate and the inflation rate.