your answer is A.) Over-Planting of wheat wore out the soil.
Answer:
Institutionalization of Jim Crowe laws and increased availability of manufacturing jobs.
Explanation:
After the return to power of white democratic leaders in the South during late XIX century, local government encated laws to limit the political participation of African-Americans and also to segregate them. At the same time, Northern and Western states opened a number of job positions, specially in the steelmaker industry, where this population saw a new opportunity to leave behind discrimination in the South.
I know one of the answers are "the fingers of the wool pluckers would be eaten by the acid that was used to loosen the wool and pulled off by bare hands"
But I am not sure what the other two are, if you get them please let me know.