The Rulers of Non-Inca States Defeated by the Inca Military

The rulers of non-Inca states defeated by the Inca military and who then brought to Cuzco were effectively:

A) ambassadors for their home nations whom the Inca afforded a large measure of sovereignty to, even after they became part of the Inca polity
B) the equivalent of U.S. senators, powerful representatives of their "states" in the capitol of the nation they had become members of
C) hostages
D) sacrifice victims, killed quickly after their capture