Jacob Was Never Fond of Cheese Pizzas

Multiple Choice

Jacob was never fond of cheese pizzas.Recently,a new pizza outlet opened up in his neighborhood.After eating cheese pizzas from the outlet on weekends,Jacob has now developed a strong liking for pizzas.This change in Jacob's liking of pizzas over a period of time is an example of the

A) observer-expectancy effect.
B) focusing effect.
C) mere-exposure effect.
D) subadditivity effect.