Final answer:
The radical progressive movement in American history was influenced by the labor movement and various prominent figures.
Step-by-step explanation:
The subject of this question is History. The roots of the radical progressive movement can be traced back to the labor movement in American history. This movement aimed to address social and economic inequalities, improve working conditions, and advocate for workers' rights. It was influenced by prominent figures such as Ida Tarbell, Eugene Debs, Jane Addams, and Robert La Follette.
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