When the unit impulse response of a second order system is \(\frac{1}{6}{e^{ - 0.8t}}\sin 0.6t\), the natural frequency and damping ratio of the system are respectively.

• A. 1 rad/s and 0.8
• B. 0.64 rad/s and 0.8
• C. 1 rad/s and 1
• D. 0.64 rad/s and 1