Find Inverse of the Matrix $\left[ \begin{array} { l l l } 2 & 2 & 0 \\0 & 2 & 0 \\1 & 0 & 1\end{array} \right]$

Multiple Choice

Find inverse of the matrix. $\left[ \begin{array} { l l l } 2 & 2 & 0 \\0 & 2 & 0 \\1 & 0 & 1\end{array} \right]$

A) $\left[ \begin{array} { c c c } 2 & - 2 & 0 \\0 & 2 & 0 \\- 2 & 1 / 2 & 1\end{array} \right]$
B) $\left[ \begin{array} { c c c } 2 & - 1 / 2 & 0 \\1 & 2 & 0 \\- 2 & 1 / 2 & 1\end{array} \right]$
C) $\left[ \begin{array} { c c c } 1 & - 1 & 1 \\0 & 1 / 2 & 0 \\- 1 & 1 / 2 & 1\end{array} \right]$
D) $\left[ \begin{array} { c c c } 1 / 2 & - 1 / 2 & 0 \\0 & 1 / 2 & 0 \\- 1 / 2 & 1 / 2 & 1\end{array} \right]$

E) none