Answer:
the foot-in-the-door phenomenon.
Explanation:
It is a strategy in psychology and it is used in order to make someone do something we ask from them. The one who persuades another, picks a simple thing at first and that way, makes sure that they will do the same when a bigger thing comes along. Why is it important, because if we asked from them a '' bigger favor '' at first, they would not agree. An example: Sarah asked Tina to steal a candy. She said yes. A few days later, Sarah said she would like Tina to steal an expensive dress for her, and Tina said yes.