What is the primary problem in comparing income inequality in the US with income inequality in other countries?

As a general rule, marginal utility will be less:

a. as less of the good is consumed. b. as more of the good is consumed. c. when average utility is at a maximum. d. only when the good is inferior. e. when satisfaction is less than cost.

A firm's demand curve for labor coincides with the:

a. marginal cost curve. b. average cost curve. c. marginal revenue curve. d. marginal revenue product curve.