Answer:
door in face
Step-by-step explanation:
Door-in-the-face technique: In social psychology, the term door in the face technique is also denoted as DITF, and is defined as a technique of compliance method. It was introduced by Robert Cialdini and his colleagues in 1975. It works on the principle of reciprocity.
DITF technique is defined as a phenomenon in which an individual tends to make or convince the other person by complying for a large or big request so that the other person will at least get convinced for a smaller request.
In the question above, Oscar’s strategy signifies the door-in-the-face technique.