Based on the information in the map, the presidential election of 1860 reflected

Based on the information in the map, the presidential election of 1860 reflected which of the following american trends? (apex)

a. the south's decreasing ability to protect its proslavery interests
b. the north's decreasing reliance on abolitionism as a party platform
c. the south's increasing support from urban industrial laborers
d. the north's increasing willingness to compromise on the issue of slavery