Answer:
d. rocks are made of more than one mineral
The restoration of Chinese rule, the voyages of Zheng he, and the reintroduction of civil service examinations are all associated with the rise of nationalism, among other things.
1. Abundant Natural Resources
2. Abundant Labor Supply
3.Railroads
4.Technological advances that saved time consuming labor.
5. Pro buisness government policies.
Debris seems like it fits well <span />