Who gained the most french and indian 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.

In 1819, what did the united states obtain from spain for $5 million?

Brainliestttme : ) what demographic changes occurred after world war ii?