Answer:
B
Explanation:
The inca system did not use money for exchange but reciprocity and taxes payment was by allegiance from members of the community to their rulers to oblige to doing certain work.
There was no defined communication system in the Inca empire; this has baffled several historian considering how well off they were from necessary instruments of old civilisation. This transform to their inability having a writing system.
So option B suffices as the right answer.