In game tree analysis, which of the following best describes the outcome when player A has a dominant strategy over player B in a simultaneous game?

When player A has a dominant strategy, A will always choose that action regardless of what B does, because it yields a higher payoff in every possible scenario. In a simultaneous‑move game, this means B cannot influence A’s choice; A’s payoff is fixed by the dominant action. Consequently the game’s equilibrium is simply A playing the dominant strategy while B best‑responds, often leaving B with a suboptimal outcome. For example, if A’s dominant choice is “Cooperate” and B’s best reply is “Defect,” the final payoffs are predetermined by A’s choice, making the game’s result straightforward.