Based on the Table Below, How Many Workers Will the Firm

Based on the table below, how many workers will the firm employ in order to maximize profits? $$\begin{array} { c c c c } \text { Workers } & \text { Output } & \text { Praduct Price } & \text { Wage Rate } \\\hline 1 & 40 & \$ 14 & \$ 500 \\2 & 90 & \$ 14 & \$ 500 \\3 & 160 & \$ 14 & \$ 500 \\4 & 230 & \$ 14 & \$ 500 \\5 & 290 & \$ 14 & \$ 500 \\6 & 340 & \$ 14 & \$ 500 \\7 & 380 & \$ 14 & \$ 500\end{array}$$

A) 4
B) 5
C) 6
D) 7
E) 8