The transfer function relating a step input to the output of a control system is:
$$16/(s^3+0.8s^2+16s)$$
The natural frequency $$omega_n$$ of the system and the damping ratio $$zeta$$ are most nearly:
A. $$omega_n=2" rad/s; "zeta=0.1$$
B. $$omega_n=2" rad/s; "zeta=0.2$$
C. $$omega_n=4" rad/s; "zeta=0.1$$
D. $$omega_n=4" rad/s; "zeta=0.2$$