Answer:
The correct answer is B. a positive-sum game.
Step-by-step explanation:
The positive sum is an expression derived from game theory that refers to a situation in which participants can cooperate and make a profit (+1), so the sum of the resulting winnings is a positive number (+ 1 + 1 = 2 or more).
A positive sum game is a scenario where agents have options capable of improving everyone at the same time. A positive sum game in everyday life is the exchange of favors, where each person can produce a great benefit to another with a small cost.