Solve the system by the addition method. x squared plus y squared equals 16 16 x squared plus 9 y squared equals 144 Question content area bottom Part 1 A. {(0, 3), (0, negative 3)} B. {(3, 0), (negative 3, 0)} C. {(0, 4), (0, negative 4)} D. {(4, 0), (negative 4, 0)}