Given the Total Cost Schedule Below, at What Level of Output

Multiple Choice

Given the total cost schedule below, at what level of output is the average cost the lowest?
$$\begin{array} { | l | l | l | l | l | l | l | l | } \hline \text { Output } & 0 & 1 & 2 & 3 & 4 & 5 & 6 \\\hline \text { Total Cost } & 50 & 70 & 60 & 70 & 80 & 110 & 140 \\\hline\end{array}$$

A) 2
B) 3
C) 4
D) 5