The answer seems indeed to be letter D) War and violence leave a lasting impact on people, especially on soldiers.
Ambush, by Tim O'Brien, narrates his own participation as a soldier in the Vietnam War. His memory of killing a young enemy soldier still haunts him, some days more, some days less. There are days when he doesn't feel, doesn't remember anything. But, from time to time, the image of the young soldier reappears, out of a fog, and then vanishes.
Facing it, by Yusef Komunyakaa, is a poem in which the author narrates the impact of the Vietnam War over himself and others after visiting a Memorial. The names, the losses, the pain, all touch him deeply, as the veteran who has lost an arm is also forever touched by the conflict. As the speakers says,
"I said I wouldn't
dammit: No tears.
I'm stone. I'm flesh."
He can't help it but to be emotional.
