Pivot once about the circled element in the simplex tableau, and read the solution from the result. x1 x2 x3 $1 $2 z 4 10 13 1 0 1 O 2 0 4 3 2 -4 O A. X3 = 5, x2 = -7, z = - 10; x,, S1, S2 = 0 O B. X3 = 10, x2 = 10, z = 7; x4, S4, s2 = 0 OC. X3 = 10, x2 = 7, z = 10; x4, S4, S2 = 0 O D. X3 = 5, x2 = -7, z = 10; x4, S1, s2 = 0