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The characteristic equation of a system is $$s^{3}+3s^{2}+\left ( K+2 \right )s+3K=0.$$ In the root locus plot for the given system, as $K$ varies from $0$ to $\infty$, the break-away or break-in points(s) lie within

1. $(-1, 0)$
2. $(-2, -1)$
3. $(-3, -2)$
4. $(-\infty, -3)$