While canvassing a neighborhood, a salesperson informs local homeowners of the city's plans to build a group home for the mentally disabled nearby. "home prices here will probably fall as a result. have you thought of selling your home while you can still get top dollar? " the salesperson's actions would probably be considered: a. blockbusting b. an attempt to induce panic selling c. ethically questionable, but probably legal d. both blockbusting and an attempt to induce panic selling

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.