The best example of Total War among the options given is:
A. Propaganda during World War I had a major impact on how the civilian population viewed the war.
Total War refers to a conflict in which countries mobilize all of their resources and populations, including civilians, and where the distinction between combatants and non-combatants becomes blurred. Propaganda played a significant role in Total War by influencing public perception, boosting morale, and fostering support for the war effort among civilians, thus indicating a total commitment to the war beyond just the battlefield. Other options may relate to the war's impact or strategies but do not directly illustrate the concept of Total War as effectively as option A.