# 48. In the root locus plot shown in the figure...

48. In the root locus plot shown in the figure, the pole/zero marks and the arrows have been removed.  Which one of the following transfer functions has this root locus?

(A) $s+1\over (s+2)(s+4)(s+7)$

(B) $s+4\over (s+1)(s+2)(s+7)$

(C) $s+7\over (s+1)(s+2)(s+4)$

(D) $(s+1)(s+2)\over (s+7)(s+4)$

Hint:

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