The correct answers would be
- European nations competed with each other by establishing foreign colonies
- The militaries of industrial nations wanted foreign military bases to extend their power
The answer choices include:
- Europe was united under one government and wanted to expand its global influence
- The United States refused to participate in imperialism, which made it easier for other countries to expand
- European nations competed with each other by establishing foreign colonies
- The militaries of industrial nations wanted foreign military bases to extend their power