What was the most significant use of German submarines during World War I?

A. Deterring the expansion of the war

B. Preventing a ground war in Germany

C. Preventing the resupply of Allied Forces

D. Reducing overall casualties

Answer

C. Preventing the resupply of Allied Forces

Explanation

During World War I, German submarines, or U-boats, were primarily used to disrupt and prevent the resupply of Allied forces. The German Navy implemented unrestricted submarine warfare, targeting merchant and military vessels to cut off supplies, weapons, and reinforcements reaching Britain and France. This strategy significantly affected the war by causing massive shipping losses and drawing the United States into the conflict after attacks on American ships.