Use the Table Below to Answer the Following Questions

Use the table below to answer the following questions.
Table 17.2.3

-Emperor Spring Rolls produces spring rolls.The market for spring rolls is perfectly competitive,and the price of a spring roll is $3.50.The labour market is competitive,and the wage rate is $28 a day.Table 17.2.3 shows the workers' total product schedule.To maximize its profit,Emperor hires ________ workers a day.

A) 2
B) 3
C) 4
D) 5
E) 6