Which of the following is the auxiliary equation for the differential equation y" + 6y' + 8y2 = 0? O A. None of these. OB. 2 m2 + 6m + 82 = 0 8 C. 2 бm"+ бm + 8 = 0 OD. D. 2 m" + 6m = 0 O E. E.