The answer is November 8th, 1880
Souths economy depended on mostly cotton. when the cotton gen fastened the process, they mass produced it. and made lots of money than before. such was depended on agriculture while north had factories. yet cottons still didn't make that much as industries
The answer should be C- Rare Minerals. They needed these minerals to continue the war effort, and often purchased from Mexico Rare and Raw Minerals.
I hope this helps! :)