When the relative price of a good decreases, consumers respond by buying Select one: a. a larger quantity of that good and a larger quantity of substitutes for that good. b. a larger quantity of that good and a smaller quantity of substitutes for that good. c. a smaller quantity of that good and a larger quantity of substitutes for that good. d. a smaller quantity of that good and a smaller quantity of substitutes for that good.

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.