Let $A = \left[ \begin{array} { l l } e & 0 \\0 & a\end{array} \right]$

Multiple Choice

Let $A = \left[ \begin{array} { l l } e & 0 \\0 & a\end{array} \right]$ where e and a are nonzero constants. Find $\mathrm { A } ^ { - 1 }$

A) $\left[ \begin{array} { c } \frac { 1 } { e } {1} \\1 \frac { 1 } { a }\end{array} \right]$
B) $\left[ \begin{array} { l l } 0 & e \\a & 0\end{array} \right]$
C) $\left[ \begin{array} { l l } e & 0 \\0 & a\end{array} \right]$
D)