I believe the answer is c.
This would be b the voyages of Gascony da gama
The league of nations might have forced the united states to become an international peacekeeper
The Inca Empire, or Inka Empire (Quechua: Tawantinsuyu), was the largest empire in pre-Columbian America. The administrative, political and military center of the empire was located in Cusco in modern-day Peru. The Inca civilization arose from the highlands of Peru sometime in the early 13th century.
