When a problem arises with the Navajo nation, whose territory crosses state boundaries, the Federal Bureau of Indian Affairs would help.
The Bureau of Indian Affairs is a federal government agency charged with managing the native territories and the resources that are granted to these groups, whose main officer is Bryan C. RIce. It is an organism dependent on the Department of the Interior, and is in charge of procuring through the administration of the territory and the resources the well-being of the natives lodged in lands granted by the federal government. Therefore, in the event of structural problems that transcend the Navajo Nation's sphere of influence, this agency would be the first to act.
Republicans tend to support the idea of a smaller government that is less active in society and Democrats tend to believe the government should have a more active role in society in order to help it grow.
The Transcontinental Railroad was also instrumental in putting thousands of people to work, and also they were instrumental in transporting cattle and resources in much more efficient ways.
Answer: I think answer C. (envirormental awareness) due to the fact it has noting to do with the world's growth just its envirorment. This answer may not be correct!