One fear among Southerners after the Election of 1860 was that - A. most Southerners would move to the North
B. slavery would spread west
C. Congress would try to abolish slavery
D. farmers would lose their land

I believe it’s c. Congress would try to abolish slavery

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada