Which is not true of world war i? u-boats were used by the axis powers. it was a one-front war. poisonous gases were used by both sides. it was considered a total war.

I belive it is that it was a one-front war, becuase there were battles in France and Northern Africa, aming other places, which leads me to say that it was a one-front war.

B.) It was a one front war. Because that is NOT true about world war one. so that would make sense