Which of the following statements with respect to the stability of a control system is true?
1. The roots of the characteristic equation are on the left half of the s-plane.
2. The system is bounded input bounded output (BIBO) stable.
3. Stability is independent of the input.
4. The roots of the characteristic equation are on the left half of the s-plane and on the imaginary axis.

A. Only 1 and 3 are true

B. Only 1, 2 are true

C. Only 1, 2 and 3 are true

D. Only 4 is true

Answer: Option C