A second order system has poles at -1 ± j2 and zero at 1. What is the transfer function of the system if the steady state output to an input of unit step is c(t) = 3 ?
- A. (s - 1)/(s^2 + 2s + 5)
- B. -15(s - 1)/(s^2 + 2s + 5)
- C. (s - 1)/(s^2 + 2s + 4)
- D. 5(s - 1)/(s^2 + 2s + 5)