Answer :
Answer:
a.foot-in-the-door
Explanation:
The door-to-door principle in psychology is one of the forms of manipulation where one starts by asking the subject to do something feasible (such as driving to the airport), but which is related to the actual purpose of manipulation, which is to induce the person. to be subjected to painful behavior that benefits the handler (such as waking up at 6 o'clock to do a favor). Thus, the subject feels engaged, that is, psychologically arrested for his minimal act, prior to the most painful act.