In sequential games, the Subgame Perfect Nash Equilibrium is ______________________ , O the solution in which every player, at every turn of the game, is playing an individually optimal strategy. 0 is an outcome where, given the strategy choices of the other players, no individual player can obtain a higher payoff by altering their strategy choice. 0 the solution in which every player, at every turn of the game, chooses a particular strategy with complete certainty. O the solution in which every player, at every turn of the game, randomizes across strategies according to a set of probabilities he or she chooses. I}