The opportunity cost of an action is
a. objective and will be the same for all individuals.
b. a measure of the undesirable aspects involved in the action.
c. applicable only to choices involving material goods like commodities.
d. the highest valued alternative forgone as the result of choosing an option.

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.