Final answer:
France argued for the harshest punishment for Germany after WWI.
Step-by-step explanation:
The country that argued for the harshest punishment for Germany after WWI was D. France. France was deeply affected by the war and sought to cripple Germany's military, economy, and territory to prevent it from threatening France's security in the future. The harsh terms imposed on Germany in the Treaty of Versailles, including massive reparations payments, territorial losses, and disarmament, were largely influenced by the French desire for security.
Learn more about punishment for Germany after WWI