The reduced row-echelon forms of the augmented matrices of four systems are given below.

(1 point) The reduced row-echelon forms of the augmented matrices of four systems are given below. How many solutions does each system have? a.011 A. Unique solution B. No solutions C. Infinitely many solutions D. None of the above 0 1 0-18 0 0 1 16 b. A. No solutions B. Unique solution C. Infinitely many solutions D. None of the above C. 0 0 1-4 A. Unique solution B. No solutions C. Infinitely many solutions D. None of the above 1 0-17 lo d. 0 0 0 1 A. No solutions B. Unique solution C. Infinitely many solutions D. None of the above