Firm A and Firm B are duopolists. They are choosing the price for which they will sell their products and the quantity they will sell. Both firms make their decisions simultaneously. The __________ in this situation occurs when Firm B chooses a pricing strategy given the strategy that Firm A chooses, and Firm A chooses a pricing strategy given the strategy that Firm B chooses.

a. Von Neumman
b. Nash
c. cartel
d. Morgenstern