In 1828, a teen aged Abraham Lincoln guided a flatboat down the Mississippi River to New Orleans. The adventure marked his first visit to a major city and exposed him to the nation's largest slave marketplace.
Frederick douglass provided audiences with a first hand account because he used to be a slave but he was freed
Changes: Constitutional end to slavery and granted citizenship and voting rights.
Continuities: Blacks continued to work on plantation lands doing much the same work as before 1865. They were segregated from whites and often were not given the right to vote.
Thomas Jefferson was know for his thinking and writing
By the beginning of October of 1950, UN forces had pushed the North Koreans back to the Yalu River. Option three is correct.
By September 1950, UN forces led by the American General MacArthur landed in Inchon and immediately pushed the North Koreans back over the 38th parallel. Later on, by October 1950 they had rolled back the communists to the Yalu River on the border with China.