Empirical evidence suggests that more digital cameras are being sold today than one year ago, and the selling price has decreased. The probable reason for this could have been an increase in supply

The marginal utility of a unit of good Y to Jane is

a. the additional utility that Jane gets from consuming one more unit of Y. b. defined in money terms as the minimum amount Jane is willing to pay for that additional unit of Y. c. defined in money terms as the maximum amount Jane is willing to pay for all the Y she buys except that additional unit. d. All of the above are correct.

If the demand curve for a firm is downward-sloping, its marginal revenue curve

A) will lie below the demand curve. B) will lie above the demand curve. C) is the same as the demand curve. D) is horizontal.