What was the most significant use of german submarines during world war i? a. deterring the expansion of the war. b. submarines were supposed to prevent a ground war in germany. c. preventing the resupply of allied forces. d. reducing overall casualties

The correct answer in this question is option C. The use of German submarines during World War I prevented the resupply of Allied Forces. Great Britain was not self-sufficient in terms of food. The bombing of British liner Lusitania caused many deaths and prevented the trading of food and ammunition to Britain.