Answer:
e. a and b only
A and B both statements are correct, because in a monopoly in order to maximize profits a firm will have to produce the amount of output at which its marginal costs = to its marginal revenues, by doing this the firm is able to maximize its profit. Also it is a basic and necessary characteristic of a monopoly that in a pure monopoly only one firm is in the market or industry and is the sole producer.
Step-by-step explanation: