$\left[ \begin{array} { r r r | r } 1 & 0 & 1 & - 2 \\0 & 1 & 2 & - 5 \\0 & 0 & 0 & 0\end{array} \right]$

$\left[ \begin{array} { r r r | r } 1 & 0 & 1 & - 2 \\0 & 1 & 2 & - 5 \\0 & 0 & 0 & 0\end{array} \right]$

A) infinitely many solutions of the form $x = - 2 + z , y = - 5 + 2 z , z = z$
B) infinitely many solutions of the form $x = - 2 - z , y = - 5 - 2 z , z = 0$
C) $x = - 2 , y = - 5 , z = 0$
D) infinitely many solutions of the form $x = - 2 - z , y = - 5 - 2 z , z = z$