If the price of a good is decreased and total revenue received from the sale of this good does not change, then the price elasticity of demand for the good is

Due to the law of diminishing marginal utility, _____

a. the first unit of a product offers more satisfaction than the last unit of the same product b. the marginal utility curve is upward sloping c. when marginal utility becomes negative, total utility increases d. marginal utility is zero when total utility is zero e. when marginal utility becomes positive, total utility declines

For a monopolist, average revenues:

A. are always equal to price. B. equal price only at the profit maximizing quantity. C. are always zero at the profit maximizing quantity. D. are maximized when total revenues are maximized.