What Does the Long-Run Phillips Curve Represent

Multiple Choice

What does the long-run Phillips curve represent?  

A)  It represents the fact that inflation is consistent with many unemployment rates. 
B)  It represents the fact that inflation will NOT influence unemployment in the long run. 
C)  It represents a situation where expected inflation can never equal actual inflation. 
D)  It represents a situation where unemployment occurs in the short run, but NOT in the long run.