How old is the oldest tribe in the world

In 1958, the aarp was organized to promote

The constitution protects the rights of citizens by limiting the power of government

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.