In which region would one be most likely to find additional evidence of the earliest human civilizations?

asia
europe
north america
south america

Japanese government was modeled after the system in

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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.