Let s = (s1 ; s2 ) be a (pure strategy) Nash Equilibrium of a certain two player strategic form game G. Pick the right answer(s) a. s is a Pareto Optimal outcome of G . b. s is not necessarily the unique Nash Equilibrium G. c. If s^ = (s^1; s^2) is a strategy profile at which at least both players receives a strictly higher payoff than at s, then s1 =/ s^1 and s2 = s^2. d. s is also IEDSs