Historically, the most significant geographic obstacle to the western migration of people from the east coast of the united states during the 19th century was a) the great plains. b) the rocky mountains. c) the mississippi river. d) the appalachian mountains.

What was the land ordinance of 1787's view towards native americans? it allowed americans to settle on any land they wanted, even land owned by native americans. it allowed the government to move native americans to specific areas to keep them from attacking. it forbid native american lands from being taking from them without their consent. the ordinance of 1787 doesn't mention native americans since they are not american citizens.