After Having a Very Large Meal at Her Mother's House

After having a very large meal at her mother's house, Stefani complains that she is "too full to move." Soon after, Stefani's aunt arrives with a strawberry pie, which is Stefani's favorite, and Stefani eats three large pieces of the pie.Stefani's eating of the pie after having a large meal is best explained by the

A) "pull" of external stimuli.
B) "push" of internal needs.
C) process of homeostasis.
D) drive reduction of stimulus motives.