双向修饰

以下是引用charlie6989在2008-11-8 22:34:00的发言：
OG11-95

Unlike Schoenberg's twelve-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 twelve-tone system that dominated
(B)    Schoenberg and his twelve-tone system which dominated
(C)    Schoenberg, whose twelve-tone system dominated
(D)    the twelve-tone system of Schoenberg that has dominated
(E)    Schoenberg and the twelve-tone system, dominating

ans C
The verb phrase dominating ... is called a "squinting modifier" because it looks in both direc¬tions: given the structure of the sentence, it could be meant to modify either Schoenberg and the twelve-tone system or Bartok

大全 141

141.    As the price of gasoline rises, which makes substituting alcohol distilled from cereal grain attractive, the prices of bread and livestock feed are sure to increase.
(A) which makes substituting alcohol distilled from cereal grain attractive
(B) which makes substituting the distillation of alcohol from cereal grain attractive
(C) which makes distilling alcohol from cereal grain an attractive substitute
(D) making an attractive substitution of alcohol distilled from cereal grain
(E) making alcohol distilled from cereal grain an attractive substitute

ans:E

请问为何大全这题不会造成双向修饰呢