The power of political machines declined during which period? (3 points)

The progressive era is when the power of political machines were declined.

Progressive Era

This age was a moment of extensive cultural activism and governmental reform crossed the United States that traversed the 1890s to the 1920s. The main purposes of the Progressive campaign were reducing difficulties created by industrialization, urbanization, migration, and political degradation. The movement essentially targeted federal parties and their supervisors. By holding down these fraudulent deputies in office, a further average of direct emancipation would be installed.

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explanation:

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