The correct answers are B and C, as in total war, governments equipped, transported, and supported millions of troops; and raised taxes to help pay for the war effort.
Total war is a term of the twentieth century that describes a war in which nations mobilize and force to the limit all available resources, whether human, military, industrial, agricultural, natural, technological, scientific, or of any other kind, to totally destroy the ability of another country or nation to engage in a war. Total war meant the complete subordination of politics to war.