* 14) Marginal cost A) is less than price. B) can be negative. C) is the minimum price that producers must receive to induce them to offer one more unit of a good or service for sale. D) is greater than price. E) decreases as more of a good or service is produced. Answer: C 15) A supply curve is A) the same as a production possibilities frontier. B) a marginal social benefit curve. C) a marginal benefit curve. D) a marginal cost curve. E) a downward-sloping curve