Answer: Foot-in-the -door method
Explanation:
Foot in the door method is the tactic used by a person to make other person agree on the bigger request by first proposing a smaller request.The larger request that is asked afterwards is the actual desired intent of the requester .
Smaller or initial request is just made to achieve acceptance so that at next step bigger request can get a way to receive acceptance as well.This makes it easy to receive approval on intended wish.