The frame-story structure directly enhances the theme of the past's imprint on the present. The correct option is A.
The themes of honesty, regret, forgiveness, acceptance, and conflict are explored in Tim O'Brien's novel Ambush.
The story is narrated in the first person by O'Brien himself and is taken from his The Things They Carried collection. After reading the story, the reader realizes that O'Brien may be exploring the theme of honesty.
The frame-story structure directly enhances the theme of the past's imprint on the present.
Thus, the correct option is A.
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