Au. s. treasury bond is
a. store of value and common medium of exchange.
b. store of value, but not a common medium of exchange.
c. a common medium of exchange, but not a store of value.
d. neither a store of value nor a common medium of exchange.

Because this market is a monopolistically competitive market, you can tell that it is in long-run equilibrium by the fact thatmr=mc at the optimal quantity for each firm. furthermore, a monopolistically competitive firm's average total cost in long-run equilibrium isless than the minimum average total cost. true or false: this indicates that there is a markup on marginal cost in the market for engines. true false monopolistic competition may also be socially inefficient because there are too many or too few firms in the market. the presence of the externality implies that there is too little entry of new firms in the market.