Which one is the best answer

Question

A -for-tat strategy may be implemented:
a. as an attempt to cheat cooperating members of an oligopoly
b. as an attempt to acquire market dominance and become a monopolist
c. as a punishment strategy for cheating
d. a and b
e. none of the above

Answer 1

I think c. -for-Tat is a game-theory strategy for holding other players in line; its a promise of "I'll do what you do"