Which of the following should be increased during an expansion?

In the long run, a monopolistically competitive firm's price equals

A) its average total cost and its marginal cost. B) its average total cost but not its marginal cost. C) its marginal cost but not its average total cost. D) neither marginal cost nor its average total cost.

When the demand and supply of grapes both decrease at the same time, we can safely predict that the: a. price of grapes will fall

b. price of grapes will rise. c. quantity of grapes exchanged will fall. d. quantity of grapes exchanged will rise.