Do the columns ofAspan R4? Does the equation Ax = b have a solution for each b in R4? 3 1 10 3 3 0 12 6 A: 2 3 2 5 -3 -8 4 19 Do the columns ofAspan R4? Select the correct choice below and ll in the answer box to complete your choice. (Type an integer or decimal for each matrix element.) 0 A. Yes, because the reduced row echelon form ofA is D. O B. No, because the reduced row echelon form ofA is D. Does the equation Ax = b have a solution for each b in R4? 0 A. Yes, because A does not have a pivot position in every row. 0 B. No, because A has a pivot position in every row. 0 C- No, because the columns ofA do not span R4. 0 D- Yes, because the columns ofA span R4