Answer the Question on the Basis of the Following Cost

Answer the question on the basis of the following cost data. $\begin{array} { | c | c | } \hline \text { Output } & \text { Total Cost } \\\hline \mathbf { 0 } & \mathbf { \$2 4 } \\\hline 1 & 33 \\\hline 2 & 41 \\\hline 3 & 48 \\\hline 4 & 54 \\\hline 5 & 61 \\\hline 6 & 69 \\\hline\end{array}$ The average total cost of producing 3 units of output is

A) $14.
B) $12.
C) $13.50.
D) $16.