Question

"Beside him lay his rifle and over his shoulders was slung a pair of field glasses. His face was the face of a student, thin and ascetic, but his eyes had the cold gleam of the fanatic. They were deep and thoughtful, the eyes of a man who is used to looking at death."

This description taken from "The Sniper", we see that war has made the protagonist
A. more intelligent and studious.
B. extremely fearful and wary.
C. older than his years.
D. excited and jumpy.