Walter's Wheat Farm Sells Its Output and Hires Its Labour

Multiple Choice

Walter's Wheat Farm sells its output and hires its labour in perfectly competitive markets. In the short run, Walter can vary only one input, labour. When Walter is producing in short-run equilibrium, all of the following conditions, except one, will necessarily be satisfied. Which is the exception?

A) The value of marginal product of labour equals the wage rate.
B) The marginal cost curve crosses the marginal revenue curve from below.
C) Marginal revenue equals the price of the firm's output.
D) The firm's total revenue will decrease if more labour is hired.