I think the answer is C :)
A. The war effort required American civilians to contribute.
Total war means the country fighting needs not just all aspects of military personnel but also the dedication of civilians.
In World War II, American civilians were asked to participate in the war effort by giving up items needed for the war. Rationing of major items needed for the war made sure there was food and supplies for the soldiers. Civilians were also asked to purchase bonds to help fund the war effort. Factories were transformed into war machines and people were put to work including women. The entire society became focused on the war.
Answer: Great Britain and France
Explanation: The French and Indian War began over the specific issue of whether the upper Ohio River valley was a part of the British Empire, and therefore open for trade and settlement by Virginians and Pennsylvanians, or part of the French Empire.