This Table Shows the Total Costs for Various Levels of Output

This table shows the total costs for various levels of output for a firm operating in a perfectly competitive market. According to the table shown,the firm's profit is:

A) maximized at 3 units of output.
B) maximized at 4 units of output.
C) maximized at 5 units of output.
D) not maximized at any level of output given.