Navarrete's Studies on Fear Learning and Extinction Based on Group

Navarrete's studies on fear learning and extinction based on group membership revealed that __________.

A) fear of in-group men is the easiest to acquire
B) fear of in-group members was most difficult to acquire and most difficult to extinguish
C) fear of out-group men was the most difficult to extinguish
D) women learn fear of out-group members more easily than men