Mostly the reasons were economic. The country's economy was dismembered when it entered the great depression and they had to take care of that. The South used this to reinforce its values because nobody was bothering them since the great depression forced the government to move its focus on something else.
The answer is B) Difficulties that resulted from not having separate presidential and vice presidential election in the electoral college in the election of 1800. Before this change, they basically just chose the runner up president as a VP.
The answer is B
Hope this helps:)
