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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