A Profit-Maximizing Firm's Daily Total Revenue Is $155 with 3

Multiple Choice

A profit-maximizing firm's daily total revenue is $155 with 3 workers, $200 with 4 workers, and $230 with 5 workers. The cost of each worker is $40 per day. The firm should

A) not hire a fourth worker.
B) hire four workers.
C) hire five workers.
D) hire more than five workers.