A Win-Win Game Is a Game

A win-win game is a game:

A) in which the total benefits for all participants total zero.
B) which helps people to learn about themselves, interpersonal relationships, and how groups function from a group dynamics or social psychological point of view.
C) in which one participant's gains result only from another participant's equivalent losses.
D) which is designed in a way that all participants can profit from it in one way or the other.
E) in which the wealth is just shifted from one to another.