In the early 80s why was there so little settlement on the Great Plains ​

Before the civil war, the south’s economy was based on enslaved labor. large cities. immigrant workers. factories.

Who was the leader of the black nationalists in the 1920s?

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.