Which system of equations represents the matrix shown below?
[11 2 21 15
2 3 6 -29
13 9 2 22
11x +2y-21z=15
OA. 2x-y+6z= -29
13x+9y+z= -22
11x+2y-21z = 15
OB. 2x-3y +6z= -29
13x+9y+2z = -22
11x +2y +21z = 15
OC. 2x+3y +6z= -29
13x+9y+2z = 22
11x +2y +21z = 15
OD. 2x-y +6z = -29
13x+9y + 4z = -22
