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