The cournot model of oligopoly assumes that a. firms decide what quantity to produce. b. firms do not cooperate. c. firms make their decisions simultaneously. d. all of the above.

D. all of the above.

Explanation:

In the Cournot Model of Oligopoly firms choose quantities at the same time and independently, and industry output determines price through demand. According to my research on this type of model, I can say that based on the information provided within the question it assumes that (like mentioned above) the firms decide the quantities at the same time and since they are doing it independently there is no need for cooperation. Therefore the answer is D. all of the above.

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