The inca civilization had a unique method of tracking events and history what was that method

A quipu, or knot-record (also called khipu), was a method used by the Incas and other ancient Andean cultures to keep records and communicate information. In the absence of an alphabetic writing system, this simple and highly portable device achieved a surprising degree of precision and flexibility.

Bis your answer and your welcome

Ibelieve b because alexander graham bells wife’s and mother was deaf. hope this you out