Why Was World War II More Destructive in Europe Than

Why was World War II more destructive in Europe than World War I?

A) World War II was a war that for the first time involved all sectors of society, not just the military and munitions manufacturers.
B) Nazi policies fanaticized the German army, leading it to wreak far greater material destruction than the army of the German kaiser during World War I.
C) Armies in World War II had fought a war of movement on the ground and in the air, and massive bombing campaigns leveled thousands of square miles of territory.
D) The Allies in World War II were much more bent on punishing Germany in an effort to avenge the victims of Nazi aggression.