A nation that has a comparative advantage in a product will not import any of it.

Graphically, a firm's total profit equals:

a. the distance between the firm's marginal revenue and marginal cost curves. b. the distance between the firm's demand and supply curves c. the distance between the firm's total revenue and total cost curves. d. the distance between the average revenue and marginal revenue curves.

The main objective of advertising for a monopolistically competitive firm is

A) to differentiate the product and raise sales. B) to reduce cost. C) to earn long run profits. D) to comply with government requirements on product information.