Aurora Custom Cabinets Produces and Sells Custom Kitchen Cabinets

Aurora Custom Cabinets produces and sells custom kitchen cabinets.The firm has determined that if it hires 10 workers,it can produce 4 sets of cabinets per day.Alternatively,if it hires 11 workers,it can produce 4.2 sets of cabinets per day.It sells each set of cabinets for $2000,and it pays each of its workers $200 per day.What will help the firm to make the right decision regarding hiring the 11th worker

A) For the 11th worker, the value of the marginal product of labour is $500.
B) For the 11th worker, the marginal revenue product is $400.
C) If the firm hires 11 workers, the firm is maximizing its profit.
D) If the firm hires 11 workers, then its profit would decrease.