Which major aspect of narrative nonfiction can you trace in this excerpt from Theodore Dreiser’s “My Brother Paul”?

As I look back now on my life, I realize quite clearly that of all the members of my family, subsequent to my mother's death, the only one who truly understood me, or, better yet, sympathized with my intellectual and artistic point of view, was, strange as it may seem, this same Paul, my dearest brother.
Areflection
Bfigurative language
Cdramatic irony
Dethical appeal