Question one is A and question two is B question three is C
B) Plain Native Americans benefited from the horse
They didn't because they weren't focused on it. It was the age of technological advancement, industry, wild parties and rich city slickers. The so called roaring twenties. Everyone was focused on factories and development that they didn't pay attention to the farmers.
Due to the rise of industrialism, the north was mostly comprised by factories. In addition, white men in the north were literate at a higher rate than men in the South. Men in the north tended to be businessmen, scientists, etc (i.e. professionals as opposed to plantation owners/farmers like in the south). The south had a higher rate of illiteracy than the north, and was deeply influenced by an economy that depended on slavery and agriculture to thrive.
