Answer:
What exemplifies these men as heroes, as described by Hemingway, is:
D. They act casually and go about regular business, such as smoking, while actually in grave danger.
Explanation:
"A Farewell to Arms" is a novel by author Ernest Hemingway narrated from a first-person perspective. The narrator is Frederic Henry, an American lieutenant who is serving in Italy during the first World War.
This particular excerpt shows how the men are able to keep a cool head even though they know an attack is about to happen. That is what distinguishes heroes from those they protect. While regular people would feel nervous or scared, would run away to escape danger, heroes are able to remain calm. To show that, Hemingway describes how easily they go about regular business, such as smoking, as if danger is not lurking.
there's a girl i don't quite know
who would look at home in polaroids
though i'd never tell her so
there's a girl with perfect imperfections and scars
who's beautiful in such a unique way
and braver than most are
there's a girl with a soft voice and smile
a girl who perseveres
and has for such a long while
there's a girl who finds a way
a girl who's here despite it all
there's a girl who's brave enough to stay
I hope this helped you hon:)
