Europes trade was bad because Rome fell and there was no protection fot traders. On the other hand Asia, Africa, and Middle East trade was doing better than ever because new inventions were coming out to make their lives easier.
The amendment grants suffrage to former male African-American slaves, but not to women.
Of these options, "<span>Better technology allows easier access to water supplies" is the best answer. Things like canals and waterways greatly increase the number of people who are able to live and farm on dryer land. </span>