Larry Is Visiting His Grandmother and Cooking Dinner for Her

Larry is visiting his grandmother and cooking dinner for her. Since his grandmother has a different model of microwave oven than his, he has learned that he needs to push a different sequence of buttons on his grandmother's microwave oven when he wants to use it for cooking. This is an example of:

A) generalization.
B) discrimination.
C) sensory preconditioning.
D) negative patterning.