The Following Table Shows the Total Revenue (In Dollars)and Total

Multiple Choice

The following table shows the total revenue (in dollars) and total cost (in dollars) from the production and sale of different units of a product.
Table 2-1

-Refer to Table 2-1.What is the firm's profit from the sale of the 3rd unit of the good?

A) $13
B) $11
C) $12
D) $39
E) $27