As northern urban areas develop, what happened in the south?

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.

What kind of contact did christopher columbus and native americans initially have?

What battle in the civil war was known as the bloodiest war ?