Find the Inverse of a If It Has One, or State

Multiple Choice

Find the inverse of A if it has one, or state that the inverse does not exist.
- $$A = \left[ \begin{array} { r r } 2 & 8 \\3 & 12\end{array} \right]$$

A)
$$\left[ \begin{array} { r r } 12 & - 8 \\- 5 & 3\end{array} \right]$$
B) Inverse does not exist
C)
$$\left[ \begin{array} { r r } 12 & - 8 \\- 3 & 2\end{array} \right]$$
D)
$$\left[ \begin{array} { c c } \frac { 1 } { 2 } & 0 \\0 & \frac { 1 } { 12 }\end{array} \right]$$