80.SAT句子提升Using modern forensic techniques,the true identity

80.SAT句子提升
Using modern forensic techniques,the true identity,it is hypothesized by noted mystery author P.Cornwell,of Jack the Ripper,a serial killer who terrorized London in the last nineteeth century,is W.S.,and artist.
A.
B.P.Cornwell,a noted mystery author,has hypothesized that Jack the Ripper's true identity
C.noted mystery author P.Cornwell has hypothesized that true identity of Jack the Ripper.
我选的B,我觉得这两个没区别啊.
划线部分：Using modern forensic techniques,（the true identity,it is hypothesized by noted mystery author P.Cornwell,of Jack the Ripper,） a serial killer who terrorized London in the last nineteeth century,is W.S.,and artist.