Which accurately describes a chart developed 20 years after a historical event?
effective secondary source document
too biased for historical evidence
too focused for historical evidence
unreliable narrative source
useful primary source document

i think the answer is b.

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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