Haiku poems, woodblock printing, kabuki theater.
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.
C. preemption is the answer to your question.
I hope I helped.
Those in the South particularly Georgia favored it. Why not? They got terrific land. The Cherokee resisted as did the Northeastern (New England) states.
Missionaries also opposed it, but Andrew Jackson was convinced that he was performing a necessary good deed in passing it in 1830 after a long and heated debate in congress.
It was not a happy event. Tens of Thousands suffered going on the Trail of Tears.