The Table Below Lists the Populations, in Thousands, of Several

Multiple Choice

The table below lists the populations, in thousands, of several rural western counties. Wh: mean population?
$\begin{array}{cc}\hline \text { County } & \text { Population (thousands) } \\\hline \text { Aldridge } & 17 \\\text { Cleveland } & 20 \\\text { McCarthy } & 12 \\\text { Pope } & 22 \\\text { Sorrell } & 19 \\\text { Wilson } & 18\end{array}$
is the

A) 18.0 thousand
B) 10 thousand
C) 17 thousand
D) 18.5 thousand