How are games in game theory played? in game theory, a. players employ strategies to attain their objectives sequentially so that they are not affected by the actions of other players. b. players determine their objectives and then payoffs are randomly assigned. c. a natural experiment is used to determine the effect of a factor by treating a portion of participants, with remaining untreated participants becoming the control group. d. agents determine their objectives, and principals are hired by contract to achieve those objectives. e. rules determine what actions are allowable, players employ strategies to attain their objectives, and payoffs are the results of the interaction among the players' strategies.