On a linear demand curve, the lower the price,

Ed Sike was able to increase his net revenue by charging different prices to different customers because

A) his cost of serving different customers varied. B) his marginal costs declined as his sales increased. C) his marginal costs were rising. D) he could distinguish faculty from students at low cost.

Under which of the following conditions would a cost center be the best option?

a. Always, since they are largely run on their own b. Never, since they require a high degree of the firm's attention c. As long as the cost of monitoring is low d. As long as the benefits from monitoring are low