What technology was outlawed by most countries following World War I? A) Chemical warfare
B) Tanks
C) Submarine warfare
D) Zepplins

chemical warfare

Explanation: Chemical Warfare was outlawed by most countries after the end of World War 1. Later, in World War 2, these same countries that banned them after World War 1 did not use them after World War 2.

sumerians were responsible.

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