The United States would be protected by Spain if a conflict with England arose.
Generally speaking, industrialization greatly reduced social inequality by creating a "middle class" of people, who were able to significantly increase their incomes due to the large number of jobs available in factories.
"<span>c. Its proximity to Africa and India made trade quite successful" is the best option, since a great deal of trade during this time and indeed today is done with ships. </span>
World War 1.
Many blacks left southern states during WW1 and moved to big northern cities to work in war industries.
More went to New York city than to any other,and after the war there a lot of blacks living in Harlem who were literate and artistic.
