Answer:
C. Railroads connected cities and markets from coast to coast,
making it easier for new immigrants to migrate between shifting
employment opportunities
2.5m years ago
Hopes it helps
Copper was the resource that was
so valuable that it aided the growth of kingdoms by becoming a form of currency
and a major source of political power. The answer is letter C. Copper used was
10000 years old and discovered at the Middle East in 9000BC.
