The Foot-In-The-Door Technique

The foot-in-the-door technique:

A) is a method of encouraging people to do a small favor after they've refused to comply with a larger request
B) is a method of encouraging people to do a favor for us after we have granted them a small request
C) is a method of encouraging people to do a larger favor after they've agreed to an initially small request
D) is a method of using increasingly larger rewards to encourage people to comply with increasingly larger requests