If the characteristic equation of a closed loop system is s2 + 2s + 2, then the system is :-A-over dampedB-critically dampedC-under dampedD-undamped-C-under damped

C under damped 1 + G(s) H(s) = 0 s2 + 2s + 2 = 0 ξ < 1, under damped.