PLZ HELP QUICK DUE SOON!! WILL MARK BRAINLIEST!! (Thank you this question has been stumping me)

What message is revealed by the narrator's descriptions of the Battle of Verdun in "The Diary of a U boat Commander"?
A.)Mechanical failures caused the Germans to lose the Battle of Verdun.
B.)Advances in technology cause an unbelievable level of destruction during modern wars.
C.)The Battle of Verdun makes for dull reading because modern technology prevents bloody battles.
D.)An actual soldier is the best writer to describe any kind of battle.
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