You've Always Disliked a Particular Coworker Who Strikes You as Dishonest

Multiple Choice

You've always disliked a particular coworker who strikes you as dishonest, but he is nice to you and does you favors, so you become friendly with him despite your miivings. One day you learn that he stole personal items from your desk. You now decide to discontinue the friendship. Your negative attitude toward this coworker is strengthened through __________

A) operant conditioning.
B) instrumental learning.
C) classical conditioning.
D) reduction of cognitive dissonance.