consider a market with barriers to entry (b), i.e., with a probability b a firm i fails to enter the market. select all the statements that are true. select one or more: a. the firm decides to enter the market if its expected profits are positive. b. the firm decides to enter the market if the expected price maximizes the firm's expected profits. c. the firm decides to enter the market if the expected price is higher than its costs. d. the firm always decides to enter the market if its costs are 0.