In a Two-Player, Noncooperative, Static Game, It Is Usually Assumed

In a two-player, noncooperative, static game, it is usually assumed that:

A) Players to know the exact payoffs from alternative strategy profiles.
B) Players have different information about the payoffs from alternative strategy profiles.
C) At least one player is rational.
D) The specific identity of the players is not required to find a Nash equilibrium.
E) There are multiple Nash equilibria.