Which is true of output-choice models of oligopoly behavior?
a. Niether the Cournot nor the Stackelberg model can be constructed as a sequential game.
b. Both the Stackelberg and Cournot models can be constructed as sequential games
c. The Cournot, but not the Stackelberg, model can be constructed as a sequential game.
d. The Stackelberg, but not the Cournot, model can be constructed as a sequential game