Consider the game of Tic-Tac-Toe given in the preceding chapter. Assume that the game is in the state shown on the left below, and assume that the manager has just received the action (mark 2 2) from the first player and the action noop from the second player. Which of the messages shown on the right is a correct message to send to the first player.

X O X O

play()   play(5)   play(mark(2,2))   play(5,mark(2,2))   play(mark(3,3))   play(5,mark(3,3))   stop(mark(3,3))   stop(5,mark(3,3))   abort()   abort(5)