Answer:
d. stimulus generalization
Step-by-step explanation:
Stimulus generalization in classical condition is used to describe the reaction which involves an an individual responding to a stimulus in the same way they would respond to a similar but different stimulus. It occurs when an individual is unable to discern the differences between similar stimuli. Any yellow Ford could be mistaken for the Yellow Fords of troopers, thereby generating an immediate braking response which is usually stimulated by the sighting of the state troopers’ yellow Fords.