What does the number of American deaths suggest about WWI casualties?

What does the number of American deaths suggest about WWI casualties?

a. Deaths from disease, famine, and other war-related causes were higher than combat deaths.
b. Civilians were often targets of military action, leading to large number of civilian deaths.
c. The lower number of non-combat deaths indicate the small impact the war had on civilian life.
d. Most causalities resulted from trench warfare, with only a small number of non-combatant deaths.
e. Better sanitary conditions in military hospitals meant military personnel received better medical care than civilians.

ANSWER
A
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