Brenda Has Learned to Take an Over-The-Counter Medication 30 Minutes

Multiple Choice

Brenda has learned to take an over-the-counter medication 30 minutes before she eats a spicy meal.When she does this,she is able to prevent the heartburn and indigestion that she would experience otherwise.What does this example illustrate

A)  classical conditioning 
B)  positive reinforcement 
C)  escape conditioning 
D)  avoidance conditioning