If a firm is hiring variable resources D and F in perfectly competitive input markets, it will minimize the cost of producing any level of output by employing D and F in such amounts that:

What is the difference between labor's marginal product and marginal revenue product?

A) The marginal product of labor is the additional labor's contribution to the firm's total output while the marginal revenue product is the additional labor's contribution to the firm's total sales revenue. B) Labor's marginal product is a measure of labor's productivity while labor's marginal revenue product is a measure of labor's ability to sell the firm's products. C) The marginal revenue product of labor is the dollar value of hiring an additional worker while the marginal product of labor is the increase in the firm's physical output as a result of hiring an additional worker. D) The marginal product of labor is the increase in output as a result of hiring an additional worker while the marginal revenue product of labor is the increase in profit as a result of hiring an additional worker.

Population growth remains high in most DVCs:

A. because religious and sociocultural considerations favor large families. B. because children may provide economic security for aging parents. C. because children provide agricultural labor in rural areas. D. for all of these reasons.