Consider the accompanying matrix as the augmented matrix of a linear system. State in words the next two elementary row operations that should be performed in the process of solving the system. 1 -5 LO 5 0-2 0 3 -7 0 LO 5 0 0 1 4-2 0 0 4 14 2 What should be the first elementary row operation performed? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. Replace row 2 by its sum with times row 4. (Type an integer or a simplified fraction.) B. Interchange row 3 and row 2. C. Scale row 1 by . (Type an integer or a simplified fraction.) D. Replace row 4 by its sum with times row 3. (Type an integer or a simplified fraction.)