When Imelda Was Young, She Used to Be Fascinated by Shoe

When Imelda was young, she used to be fascinated by shoe commercials on TV. She was particularly impressed by how happy people seemed to be when buying shoes. As an adult, Imelda goes shopping for shoes at every chance she gets. This is an example of

A) operant conditioning.
B) classical conditioning.
C) spontaneous conditioning.
D) observational learning.