Use the Table Below to Answer the Following Questions

Use the table below to answer the following questions.
Table 18.2.3

-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 18.2.3 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