Which statement best describes an effect of the narrative frame in the prologue from Ralph Ellison’s Invisible Man?

The narrative frame in the prologue sets the tone of the novel by introducing the theme of invisibility and highlighting the protagonist's struggle to define his identity in a racially oppressive society.

Which statement best describes an effect of the narrative frame in the prologue from Ralph Ellison’s Invisible Man?

It introduces key thematic concerns such as invisibility.
It describes the narrator’s childhood and education.
It reveals the author’s objectives in writing the novel.
It explains the relationship between the narrator and his mother.
It presents key symbols such as the briefcase.

The best statement that describes an effect of the narrative frame in the prologue from Ralph Ellison’s Invisible Man is:

"It introduces key thematic concerns such as invisibility."