Supply has the potential to contribute to: a. Cost management, profitability, return on assets, competitive position and corporate social policy. b. Cost management, profitability, return on assets and competitive position. c. Cost management, profitability and return on assets. d. Cost management and profitability. e. Cost management.

Which of the following statements is (are) true? i. free entry to a perfectly competitive industry results in the industry's firms earning zero economic profit in the long run, except for the most efficient producers, who may earn economic rent. ii. in a perfectly competitive market, long-run equilibrium is characterized by lmc < p < latc. iii. if a competitive industry is in long-run equilibrium, a decrease in demand causes firms to earn negative profit because the market price will fall below average total cost.