Once Two Parties to a Conflict Focus on a Win-Win

Once two parties to a conflict focus on a win-win scenario,it means that rather than having a fixed set of alternatives from which to choose,the two parties can come up with new alternatives that might even expand the resource pie.This is referred to as:

A) Competitive analysis
B) Destructive negotiation
C) Focusing on the problem,not the people
D) Creating new options for joint gain
E) Focusing on superordinate goals