The correct answer is C, hypocrisy. This work of Mark Twain's is actually a fictionalized version of his own wartime experiences. He is trying to tell us that there is nothing glorious about war, that there is only death and suffering. It cannot be glorious when you have to kill somebody, or somebody will kill you. That's the irony and hypocrisy that Twain was trying to convey in this work.
Answer:
“The Sniper” uses irony to demonstrate how war reduces human beings to mere objects. ... As feared, once he lights the match, “a bullet flattened itself against the parapet of the roof” (O'Flaherty 1). As if on command, the enemy sniper shoots at any sign of movement, alike to a machine.