In the Phillips Curve, the Term ________ Reflects ________ $\bar { a }$

In the Phillips curve, the term ________ reflects ________.

A) $\bar { a }$ ; cost-push inflation
B) $\bar { v } \tilde { Y } _ { t }$ ; cost-push inflation
C) $\Delta \pi _ { t }$ ; the "true" rate of inflation
D) $\bar { a }$ ; demand-pull inflation
E) $\bar { a }$ ; the responsiveness of inflation to cost shocks