For the Output Levels in Table 21

Multiple Choice

$\begin{array}{l}\begin{array} { | c | c | } \hline \begin{array} { c } \text { Output } \\\text { (Units per Day) }\end{array} & \begin{array} { c } \text { Total Cost } \\\text { (Dollars per Day) }\end{array} \\\hline 0 & 16 \\\hline 1 & 30 \\\hline 2 & 42 \\\hline 3 & 58 \\\hline 4 & 78 \\\hline\end{array}\\\text { Table 21.4 }\end{array}$ For the output levels in Table 21.4, the minimum of the average variable cost curve occurs at a production rate of

A) 3 units per day.
B) 2 units per day.
C) 4 units per day.
D) Zero units per day.