How Was the Inca Empire Organized Administratively

How was the Inca Empire organized administratively?

A) It was divided into two parts that each had autonomous governments.
B) It was divided into city-states with elected leaders at state and local levels.
C) It was divided into rural zones with local leaders;each zone produced specific commercial products as tribute to the Emperor.
D) It was divided into four parts that were each subdivided into provinces.
E) It was highly centralized and uniform and did not contain any subdivisions.