In the prisoner's dilemma game, the statement that is true is:
Both players have a dominant strategy.
In the classic formulation of the prisoner's dilemma, each player has a dominant strategy to defect (betray the other), regardless of what the other player chooses. This leads to a situation where both players defect, resulting in a less optimal outcome than if they both cooperated. Thus, both players have a dominant strategy, making it the correct answer.