What was the impact of the completion of the Transcontinental Railroad? A) Made trading worse

B) Expanded interstate commerce

C) Did not create jobs

D) Made US more noisy

I think the answer is A

Iam not sure sorry

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