What Was the Nature of the Aztec Administration of Subject

What was the nature of the Aztec administration of subject territories?

A) The Aztecs placed members of the Aztec nobility as rulers over subject peoples.
B) All territories conquered by the Aztecs became part of a singular administration run by a trained bureaucracy located in Tenochtitlan, much like the Byzantine Empire.
C) Conquered territories were often left relatively unchanged under their old rulers as long as they recognized Aztec supremacy and paid tribute.
D) The Aztecs established a military administration with subject territories controlled by regional generals.