How did the Inca and Aztec civilizations differ during the postclassical era? A. The Inca created a politically unified empire, while the Aztecs
granted more independence to conquered territories.
B. The Inca built temples to honor their gods and leaders, while the
Aztecs felt that such projects were wasteful.
C. The Inca were able to successfully resist invasions by European
powers, while the Aztecs fell quickly to Europeans.
D. The Inca predominantly wrote and spoke the Toltec language,
while the Aztecs did not develop a written language.

Option: A. The Inca created a politically unified empire, while the Aztecs granted more independence to conquered territories.

Explanation:  

The Incas expanded and unified their territory after several conquests. Inca society rigidly organized, from the emperor, royal family, and the peasants. The Inca civilization tried to unify other conquered villages by establishing new rulers who were loyal to Incas and declaring their language Quechua as official. The Incas didn't want the people they conquered to have too much power.

The Aztec civilization tried to unify other conquered towns by conducting alliances or partnership to build their empire. They granted independence to the newly conquered territories. The new territories of the empire expected to pay tribute and taxes to the King. In most of the part, their local leaders were allowed to govern.

d: social contract theory