Which of the following best explains the concept of total war?

A. the decision by the allies to use resources from their colonies, instead of making those at home get involved in the war
B. the allies use of trenches in world war I, which prolonged attacks against the central powers and were very deadly
C. the U.S. decision of delay entering the war until 1917, but then commit themselves entirely to supporting the allies
D. a type of war in which participants use all available resources to support their war efforts, including civilians doing work on the home front

D. a type of war in which participants use all available resources to support their war efforts, including civilians doing work on the home front

Total war involves the mobilization of all society's resources, including manpower, industry, and infrastructure, to support a war effort. This concept goes beyond just military forces and involves the entire population contributing to the war in some way, whether through production, rationing, or other means.