Suppose That a Single- Price Monopolist Knows the Following Information

Suppose that a single- price monopolist knows the following information: $\begin{array}{|l|l|l|l|l|l|l|l|}\hline \text { Price } & \text { Quantity } & \text { TR } & \text { MR } & \text { Fixed Cost } & \text { TC } & \text { ATC } & \text { MC } \\\hline \$ 5.00 & 2000 & & \$ 4.00 & \$ 2000 & & \$ 5.00 & \$ 3.00 \\\hline\end{array}$ The total profit being earned by this firm at the current level of output is

A) 0.
B) - $1000.
C) - $2000.
D) $2000.
E) $1000.