¿A qué se denomina fuente histórica?

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How did the cleveland massacre impact standard oil in 1872? standard oil hired all the laborers who were nearly killed during the cleveland massacre. standard oil became a monopoly in the cleveland oil market after the cleveland massacre. standard oil was bought out by other companies in the city after the cleveland massacre. standard oil closed down to avoid additional violence in the wake of the cleveland massacre.

Which of these best describes the battle of galveston on january 1, 1863? a) a draw b) a naval battle c) a victory for the union army d) the fist civil war battle in texas