$$\begin{array} { c r } \text { Output } & \text { Price } \\1 & \$ 25 \\2 & 23 \\3 & 21 \\4 & 19 \\5 & 17\end{array}$$

Multiple Choice

$$\begin{array} { c r } \text { Output } & \text { Price } \\1 & \$ 25 \\2 & 23 \\3 & 21 \\4 & 19 \\5 & 17\end{array}$$
-If the marginal cost were $21,output would be

A) 1.
B) 2.
C) 3.
D) 4.
E) 5.