Find the Median for the Given Sample Data $\begin{array}{llll}20 & 22 & 20 & 23\end{array}$

Find the median for the given sample data.
-The number of vehicles passing through a bank drive-up line during each 15-minute period was recorded. The results are shown below. Find the median number of vehicles going through the line
In a fifteen-minute period. $\begin{array}{llll}20 & 22 & 20 & 23\end{array}$
$\begin{array}{llll}23 & 20 & 25 & 22\end{array}$
$\begin{array}{llll}30 & 26 & 26 & 24\end{array}$
$\begin{array}{llll}19 & 26 & 20 & 15\end{array}$
$\begin{array}{llll}10 & 22 & 22 & 22\end{array}$

A) 26
B) $21.85$
C) 23
D) 22