Rayshawn's Favorite Soft Drink Is Coca-Cola

Rayshawn's favorite soft drink is Coca-Cola.If he orders a Coke at a restaurant and is told that the restaurant serves only Pepsi products,he will often just order water rather than order a Pepsi.He insists that he can tell the difference between the two brands.Which learning concept is Rayshawn demonstrating?

A) Selective retention
B) Stimulus discrimination
C) Perceptual generalization
D) Selective generalization
E) Stimulus generalization