The Following Table Presents the Heights (In Inches) of a Sample

Multiple Choice

The following table presents the heights (in inches) of a sample of college basketball players.

$\begin{array} { c c } \hline \text { Height (in.) } & \text { Frequency } \\\hline 68 - 71 & 2 \\72 - 75 & 2 \\76 - 79 & 4 \\80 - 83 & 2 \\84 - 87 & 3 \\\hline\end{array}$

Considering the data to be a population, approximate the variance of the heights.

A) 5.4
B) 5.6
C) 29.2
D) 31.6