During the mid 1800s the steam locomotive and mechanical reaper aided the settlement of which us region

In a planned economy, which of the following does the job of market forces in order to determine the outcomes?

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 war in history claimed the most lives