The answer is either the third or fourth option.
I want to go more with the fourth one though!!
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 Lend-Lease Act "<span>B. It permitted Great Britain to borrow military equipment from the United States as long as they promised to return it after the war," since this was a way for the US to aid Britain without formally entering World War II. </span>
Eating is life, harambe and