Man: Hi, Susan. Have you finished reading the book Prof. Johnson recommended
Woman: Oh, I haven’t read it through the way I’d read a novel. I just read a few chapters which interested me.
Question: What does the woman mean()

A. She seldom reads books from cover to cover.

B. She is interested in reading novels.

C. She read only part of the book.

D. She was eager to know what the book was about.

简述代位权的适用条件和行使的主要内容。