-The Table Shows Information for Jen's Gymnastics

-The table shows information for Jen's Gymnastics.Jen hires coaches and can charge $20 per hour for gymnastics lessons.Jen's Gym pays coaches $30 per hour.The table shows that Jen's Gym will hire ________ coaches because ________.

A) any number less than 5; the marginal product stops increasing with the fifth coach
B) 4; the gym will earn a profit because the value of marginal profit exceeds the wage rate., but hiring a fifth coach will reduce profit
C) 1; the value of marginal product is the highest
D) 5; the marginal product is at its maximum
E) 5; total product reaches its maximum