The five democratic presidents are:
John Fitzgerald Kennedy (1961-1963)
Lyndon Baines Johnson (1963-1969)
Franklin Delano Roosevelt (1933-1945)
Harry S. Truman (1945-1953)
and James Buchanan, Jr. (1857-1861)
I think it's around the 1850s
The best options from the list would be that "Tobacco became the main crop and made the colony profitable" and "<span>The first African slaves were brought in by the Dutch in 1619," since the combination of slave labor and tobacco cultivation is what made Jamestown ultimately successful. </span>
<span> Chinese civilzation centered amost entirely around the Yellow River</span>
