Compute:
A) $\left[\begin{array}{ll}0 & -4 \\ 12 & -4\end{array}\right]$

Compute:

A) $\left[\begin{array}{ll}0 & -4 \\ 12 & -4\end{array}\right]$
B) $\left[\begin{array}{ll}6 & 4 \\ 2 & 6\end{array}\right]$
C) $\left[\begin{array}{ll}0 & 4 \\ 12 & 6\end{array}\right]$
D) $\left[\begin{array}{ll}-12 & -8 \\ -4 & -12\end{array}\right]$