Which is true of output-choice models of oligopoly behavior? A) Both

Which is true of output-choice models of oligopoly behavior?

A) Both the Stackelberg and Cournot models can be constructed as sequential games.
B) The Stackelberg, but not the Cournot, model can be constructed as a sequential game.
C) The Cournot, but not the Stackelberg, model can be constructed as a sequential game.
D) Neither the Cournot nor the Stackelberg model can be constructed as a sequential game, but other output-choice models can be.
E) There is no relationship between any output-choice model and sequential games.

ANSWER

B