In Tim O'Brien's "Ambush," which element directly enhances the theme of the past's imprint on the present?

A) the frame story structure

B) the character Kiowa

C) the reference to fatigue toxins

D) the inability to discuss war

The correct answer is B, the character Kiowa. The story narrated in first person talks about a war from the past and it is the death of Kiowa that leaves a long lasting impression on the narrator. This is because he, a person, now only became a statistic of the gruesomeness of war, as does everyone else who participates in a war eventually.