The correct answer is the hardships suffered by the working class caused by industrialization and urbanization.
Explanation: Progressive Movement refers to a set of philosophical, ethical, and economic doctrines based on the idea that progress, understood as scientific, technological, economic, and social advancement, is vital for the betterment of the human condition. This idea of progress integrates the Enlightenment ideology and has, as a corollary, the belief that societies can move from barbarism to civilization by strengthening the foundations of empirical knowledge.