Which best describes what the greatest obstacle was to Scott's plan?

How big is US compared with Britain? What happened when people got sick in colonial times? What were some failures of reconstruction? Which metals could be inside the copper-clad pennies minted after 1983? Why is the George Washington Carver famous? What is the origin of boycott? Is there still gold at sutters mill? What did Alfred t mahan suggest the US do to defend its rights to trade? When did chief Joseph became chief? The attitudes of white Americans toward native Americans before civil war? What was the famous song the union sang during the civil war? What is a quote Thurgood Marshal said? How much you worth a 1954 20.00 gold coin? What was the first African American hospital that opened? What was typical of city tenement buildings? What did Sam Houston do in Tennessee? What was the year that Massachusetts integrated its public schools? Where did most of the slaves sent to the Americas originally come from? Which of these colonies did not allow slavery at first.But changed its law as more settlers moved in? Why is it important to tell the story of the expulsion of the acadians?