Which battle was the most influential on the confedratws army during the civil war?

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.

Could anything have been done through compromise to stop it, or did it have to happen?

Who was the first explorer to sail all the way down the mississippi river