Which of the following point is not on the root locus of the system with loop transfer function \(G\left( s \right)H\left( s \right) = \frac{k}{{s\left( {s + 1} \right)\left( {s + 3} \right)}}\)

• A. \(s = - j\sqrt 3 \)
• B. s = -1.5
• C. s = -3
• D. s = -∞