Write the System of Equations Associated with the Augmented Matrix $\left[ \begin{array} { l l l l } 1 & 0 & 0 & - 1 \\ 0 & 1 & 0 & - 1 \\ 0 & 0 & 1 & - 9 \end{array} \right]$

Multiple Choice

Write the system of equations associated with the augmented matrix. Do not solve.
- $\left[ \begin{array} { l l l l } 1 & 0 & 0 & - 1 \\ 0 & 1 & 0 & - 1 \\ 0 & 0 & 1 & - 9 \end{array} \right]$

A) $x = 1$
$y = 1$
$z = 9$

B) $x = - 1$
$y = - 1$
$z = - 9$

C) $x = 8$
$y = 8$
$z = 0$

D) $x = 0$
$y = - 2$
$z = - 10$