Write the Augmented Matrix for the System $$\begin{aligned}7 x - 2 z & = - 9 \\2 y + 7 z & = 9 \\7 x + 9 y + 4 z & = 6\end{aligned}$$

Multiple Choice

Write the augmented matrix for the system. Do not solve the system.
- $$\begin{aligned}7 x - 2 z & = - 9 \\2 y + 7 z & = 9 \\7 x + 9 y + 4 z & = 6\end{aligned}$$

A)
$\left[ \begin{array} { r r r } 7 & 0 & - 2 \\ 0 & 2 & 7 \\ 7 & 9 & 4 \end{array} \right]$

B)
$\left[ \begin{array} { r r r | r } 7 & 0 & 7 & - 9 \\ 0 & 2 & 9 & 9 \\ - 2 & 7 & 4 & 6 \end{array} \right]$

C)
$\left[ \begin{array} { r r r | r } 7 & 0 & - 2 & - 9 \\ 0 & 2 & 7 & 9 \\ 7 & 9 & 4 & 6 \end{array} \right]$

D)

$\left[ \begin{array} { r r r | r } 7 & - 2 & 0 & - 9 \\ 2 & 7 & 0 & 9 \\ 7 & 9 & 4 & 6 \end{array} \right]$