Answer:
D) foot-in-the-door phenomenon.
Step-by-step explanation:
Foot-in-the-door phenomenon: In social psychology, the term foot-in-the-door phenomenon is referred to as the process of an individual started making a small request from the another person and then, later on, ask for the larger of big request because the request that is being preceded with a small request has the probability of getting fulfilled a big request later on.
Example: A man asks for a lift to one of his friends to the office and later on the next day he asks for his vehicle.