达人请帮我看道XDF语法题目

Beatrix Potter, in her book illustrations, carefully coordinating them with her narratives, capitalized on her keen observation and love of the natural world.
(A) Beatrix Potter, in her book illustrations, carefully coordinating them with her narratives
(B) In her book illustrations, carefully coordinating them with her narratives, Beatrix Potter  
(C)In her book illustrations, which she carefully coordinated with her narratives, Beatrix Potter
(D) Carefully coordinated with her narratives, Beatrix Potter, in her book illustrations
(E) Beatrix Potter, in her book illustrations, carefully coordinated them with her narratives and

正确答案是C

问题： 讲解上说A B的错误是在于coordinating的修饰对象不单一（BP / illustrations），请问如何判断某个修饰词的修饰对象不单一的情况呢？ 依据什么？