In oligopoly, minimum efficient scale is large relative to the market

If a firm is experiencing diminishing marginal returns to labor, then

a. total output must be decreasing b. total output rises more slowly as additional workers are added c. the firm must decrease the amount of labor it hires d. total output per worker must be rising e. the firm must be operating in the long run

Which of the following best describes efficiency in the demand and supply model?

a. The economy is receiving as much benefit as possible from its scarce resources and all the possible gains from trade have been achieved. b. The economy is receiving as much benefit as possible from its scarce resources but not achieving all the possible gains from trade. c. The economy is not receiving as much benefit as possible from its scarce resources but is getting all the possible gains from trade. d. The economy is not receiving as much benefit as possible from its scarce resources and not achieving all the possible gains from trade.