Obtain an Equivalent System by Performing the Stated Elementary Operation $5 x+5 y+z=7$

Multiple Choice

Obtain an equivalent system by performing the stated elementary operation on the system.
-Interchange equations 1 and 3.
$5 x+5 y+z=7$
$5 x-4 y-z=-33$
$3 x+3 z=1$

A) $3 x \quad+3 z=1$
$5 x-4 y-z=-33$
$5 x+5 y+z=7$
B) $3 x \quad+3 z=1$
$5 x+5 y+z=7$
$5 x-4 y-z=-33$
C) $x+5 y+5 z=7$
$5 x-4 y-z=-33$
$3 x+3 z=1$
D) $5 x-4 y-z=-33$
$5 x+5 y+z=7$
$3 x+3 z=1$