Both Firms in a Cournot Duopoly Would Enjoy Higher Profits

Multiple Choice

Both firms in a Cournot duopoly would enjoy higher profits if:

A) the firms simultaneously reduced output below the Nash equilibrium level.
B) each firm simultaneously increased output above the Nash equilibrium level.
C) one firm reduced output below the Cournot Nash equilibrium level, while the other firm continued to produce its Cournot Nash equilibrium output.
D) the firms simultaneously reduced output below the Nash equilibrium level and one firm reduced output below the Cournot Nash equilibrium level, while the other firm continued to produce its Cournot Nash equilibrium output.