What did Ida Tarbell hope to accomplish when she exposed the oil industry?

She hoped to  expose the rise of corporate trusts and monopolies in the Progressive Era spurred Congress to legislate regulations on business practices.

monopolies  came to the united states with the colonial administration. the large-scale public works needed to make the new world hospitable to old world immigrants required large companies to carry them out. these companies were granted exclusive contracts for these works by the colonial administrators. even after the american revolution, many of these colonial holdovers still functioned due to the contracts and land

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