Read the following epigraph from Into the Wild.
There was some books...One was Pilgrim's Progress , about a man that left his family , it didn't say why . I read considerable in it now and then . The statements was interesting , but tough .

Why does Krakauer choose this epigraph for the beginning of a chapter about both Wayne Westerberg and McCandless's family ?

A. To show that family dynamics are complex.

B. To introduce the idea that McCandless's father had complex reasons for leaving the family

C. To explain why McCandless chose to give Wayne his copy of Pilgrim's Progress

D. To show that family relationships are often easy to explain