All of the Following Is True of Communications in the Inca

All of the following is true of communications in the Inca empire EXCEPT:

A) The rugged, mountainous terrain prevented the construction of roads of the same quality as those in the Aztec empire.
B) The Incas systematically improved road networks that had been built by their predecessors, particularly the Tiwanaku and Wari.
C) The transportation system sometimes relied on suspension bridges and rafts.
D) The roads measured from three to twelve feet in width, often requiring extensive grounding, paving, and tunneling.