Find the Inverse of the Matrix (If It Exists) $\left[ \begin{array} { l l } 6 & - 7 \\7 & - 8\end{array} \right]$

Multiple Choice

Find the inverse of the matrix (if it exists) . $\left[ \begin{array} { l l } 6 & - 7 \\7 & - 8\end{array} \right]$

A) $\left[ \begin{array} { c c } - 8 & 7 \\7 & 6\end{array} \right]$
B) $\left[ \begin{array} { c c } - 8 & 7 \\- 7 & 6\end{array} \right]$
C) $\left[ \begin{array} { c c } - 8 & - 7 \\- 7 & 6\end{array} \right]$
D) $\left[ \begin{array} { c c } - 8 & 7 \\7 & - 6\end{array} \right]$
E) $\left[ \begin{array} { c c } - 8 & - 7 \\7 & 6\end{array} \right]$