Question

21 which empire does the following list describe? - state built on war - spoke quechua - built 24,800 miles of roads - no writing system - used a system of knotted strings called the quipu a aztecs b incas c olmecs d mayans

Explanation:

The Inca Empire was a state - built on war. The Inca people spoke Quechua. They constructed an extensive road network of about 24,800 miles and used a system of knotted strings called quipu as they had no writing system. The Aztecs, Olmecs, and Mayans did not match all these characteristics.

Answer:

B. Incas