The correct answer is: Local rulers maintained their local rule but had to provide tribute.
The Aztec Empire relied on a system of local rulers, known as "tlatoque," to govern various regions. These local rulers were allowed to maintain their authority over their communities but were required to pay tribute to the central Aztec government. This arrangement allowed the Aztecs to exert control over a vast territory without having to manage each region directly, as local rulers ensured compliance and collected tribute on behalf of the empire.