Which of the following conclusions about United States politics in the mid 19th century is best supported by the information presented on the map?A. Americans of the mid 19th century voted mostly on national, rather than regional concernsB. voters in 1860 hoped mostly to maintain the status quo on controversial issues such as slaveryC. United States regional divisions on controversial issues of the mid 19th century largely split along the borders of the original British coloniesD. by 1860, sectional tensions had divided the United States into disparate and conflicting regional factions