Perform the operation if possible.

$\left[\begin{array}{ccc}-2& -1& -1\\ 1& 1& 4\end{array}\right]+\left[\begin{array}{ccc}8& 1& 0\\ -1& 7& -1\end{array}\right]$

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.\left[\begin{array}{ccc}-2& -1& -1\\ 1& 1& 4\end{array}\right]+\left[\begin{array}{ccc}8& 1& 0\\ -1& 7& -1\end{array}\right]=$

B$.$ The operation is not defined.