The first screen shows the augmented matrix, A, for a nonsquare linear system of three equations in four variables, w, x, y, and z. The second screen shows the reduced row-echelon form of matrix A. [A] [[1 8 -4 -2 0] [65 [1 1 5 1 -50] -1 0]] a. Choose the system represented by A. A. w+8x-4y-2z= 0 6w+5x+5y-5z= 0 w+x+y-z=0 rref ([A]) [[1000 0] [0 1 0 -.5 0] [0 0 1 -.5 0]] OB. w+8x-4y= -2 6w+5x+5y= -5 w+x+y=-1 C b. Use the reduced row-echelon form of A to find the system's complete solution. Select the correct choice below and fill in any answer A. There is one solution. The solution set is {010)} (Simplify your answers.) B. There are infinitely many solutions. The solution set is {(...z)}, where z is any real number. (Type expressions using z as the variable. Use integers or decimals for any numbers in the expressions.) OC. There is no solution.