How did the early farmers modify their geography

Which statement best explains how the invention of corporations contributed to the economy in the 1800's

Which action by the us war department angered chief red cloud to the point that he refused to sign the treaty of fort laramie ? a) the killing of buffalo by the united states troops b) the appointment of troops to the powder river basin c) the burning of parts of the powder river basin d) the murder of chief red cloud’s wife

Which statement is true of both presidential and parliamentary systems of government?