If a monopolist sets her output such that marginal revenue, marginal cost, and average total cost are equal, economic profit must be:
A. negative.
B. Positive
C. Zero
D. Indeterminate from the given information
Answer:B
If a monopolist sets her output such that marginal revenue, marginal cost, and average total cost are equal, economic profit must be:
A. negative. B. Positive C. Zero D. Indeterminate from the given information