Align an enumerated list with matrices

Question

I want to align the four matrices by the item label as in the following image.

Any help in getting this done is much appreciated.

\documentclass[12 pt]{article}
\usepackage{amsmath}
\usepackage{enumerate}
\usepackage{multicol}

\begin{document}

\textbf{Example} : Find the transpose of each matrix.
\begin{multicols}{4}
\begin{enumerate}[(a)]
\item $\displaystyle{A=\begin{bmatrix}
2   \\
8   \\
\end{bmatrix}}$

\item $\displaystyle{B=\begin{bmatrix}
1 & 2 & 3  \\
4 & 5 & 6 \\
7 & 8 & 9  
\end{bmatrix}}$


\item $\displaystyle{C=\begin{bmatrix}
1 & 2 & 0  \\
2 & 1 & 0 \\
0 & 0 & 1  
\end{bmatrix}}$


\item $\displaystyle{D=\begin{bmatrix}
0 & 1  \\
2 & 4  \\
1 & -1  
\end{bmatrix}}$
\end{enumerate}
\end{multicols}


\end{document}

Answer 1

You could use an inline enumerate* environment from enumitem, instead of using a multicol environment.

\documentclass[12pt]{article}
\usepackage{amsmath}
\usepackage[inline]{enumitem}

\begin{document}

\textbf{Example} : Find the transpose of each matrix.

\begin{enumerate*}[label=\textbf{\alph*.}, itemjoin=\quad]
\item \(\displaystyle A=\begin{bmatrix}
2   \\
8   \\
\end{bmatrix}\)

\item \(\displaystyle B=\begin{bmatrix}
1 & 2 & 3  \\
4 & 5 & 6 \\
7 & 8 & 9  
\end{bmatrix}\)

\item \(\displaystyle C=\begin{bmatrix}
1 & 2 & 0  \\
2 & 1 & 0 \\
0 & 0 & 1  
\end{bmatrix}\)

\item \(\displaystyle D=\begin{bmatrix}
0 & 1  \\
2 & 4  \\
1 & -1  
\end{bmatrix}\)
\end{enumerate*}
\end{document}