With Adaptive Expectations, the Phillips Curve Can Be Written As $\Delta \pi _ { t } = \bar { v } \tilde { Y } _ { t }$

With adaptive expectations, the Phillips curve can be written as:

A) $\Delta \pi _ { t } = \bar { v } \tilde { Y } _ { t }$
B) $\Delta \pi _ { t } = \pi _ { t - 1 } + \overline { \boldsymbol { v } } \tilde { Y } _ { t }$
C) $\Delta \pi _ { t } = v \tilde { Y } _ { t }$
D) $\Delta \pi _ { t } = \bar { v } u _ { t }$
E) $\pi _ { t } = \pi _ { t - 1 }$