Perform the Matrix Operation $A = \left[ \begin{array} { r r } 3 & - 7 \\ 9 & 4 \end{array} \right]$

Perform the matrix operation.
-Given $A = \left[ \begin{array} { r r } 3 & - 7 \\ 9 & 4 \end{array} \right]$ and $I = \left[ \begin{array} { l l } 1 & 0 \\ 0 & 1 \end{array} \right]$ , find IA.

A)
$\left[ \begin{array} { r r } 9 & 4 \\ 3 & - 7 \end{array} \right]$
B)
$\left[ \begin{array} { r r } 0 & - 4 \\ 0 & 13 \end{array} \right]$
C)
$\left[ \begin{array} { r r } 3 & - 7 \\ 9 & 4 \end{array} \right]$
D)
$\left[ \begin{array} { r r } - 7 & 9 \\ 4 & 3 \end{array} \right]$