Sentence Correction

Unlike Schoenberg's 12-tone system that dominated the music of the postwar period, Bartok founded no school and left behind only a handful of disciples.

(A) Schoenberg's 12-tone system that dominated

(B) Schoenberg and his 12-tone system which dominated

(C) Schoenberg, whose 12-tone system dominated

(D) the 12-tone system of Schoenberg that has dominated

(E) Schoenberg and the 12-tone system, dominating

OA C

Unlike Schoenberg (Action)... , Bartok ( action of Bartok)..

This is parallelism.

Hence (C).