A Soybean Farmer Sells Soybeans in a Perfectly Competitive Market

A soybean farmer sells soybeans in a perfectly competitive market and hires labor in a perfectly competitive market.The market price of soybeans is $1 a bushel,the wage rate is $12,the farmer employs six workers,and the marginal product of the sixth worker is 10.What would you advise this farmer to do?

A) Do nothing because the wage rate and the marginal product of the last worker hired are equal.
B) Reduce employment because the wage paid is greater than the marginal revenue product.
C) Increase employment because the wage paid is less than the marginal revenue product.
D) Increase the product price so that the wage and marginal revenue product will be equal.