In the long run, the quantity of capital available to a firm is fixed

Marginal revenue product falls as more labor is hired because

A) the price of the product must fall for a perfectly competitive firm to sell more. B) the marginal product of labor is negative as additional units of labor are hired. C) the wage rate rises as more workers work more hours. D) the marginal product of labor falls as a result of the law of diminishing returns.

Refer to the figure below. The growth of access to the Internet will cause the marginal:

A. benefit curve to shift from MB2 to MB1. B. cost curve to shift from MC2 to MC1. C. benefit curve to shift from MB1 to MB2. D. cost curve to shift from MC1 to MC2.