The influx of immigrants in the united states in the second half of the 19th century most directly led to which of the following?
a. the formation of cultural neighborhoods where people from the same country/region could support one another.
b. the establishment of political reform groups focused on expanding voting rights for immigrants..
c. the failure of the railroad.
.d. the passage of the sherman anti-trust act

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