(Solved): What should be the first elementary row operation performed? Select the correct choice below and, i ...

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 4 by its sum with times row \( 3 . \) (Type an integer or a simplified fraction.) B. Scale row 1 by (Type an integer or a simplified fraction.) C. Interchange row 3 and row 2 . D. Replace row 2 by its sum with times row \( 4 . \) (Type an integer or a simplified fraction.) What should be the second elementary row operation performed? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. Replace row 1 by its sum with times row \( 4 . \) (Type an integer or a simplified fraction.) B. Interchange row 1 and row \( 2 . \) C. Replace row 3 by its sum with times row 2 . (Type an integer or a simplified fraction.) D. Scale row 4 by (Type an integer or a simplified fraction.)