A key reason the Incas were able to control their
large empire was that they
(1) outlawed human sacrifice
(2) formed a democratic government
(3) built a road system to connect distant areas
and to move armies
(4) promoted literacy and mass education
programs to teach loyalty to their subjects



Answer :

A key reason the Incas were able to control their large empire was that they built a road system to connect distant areas and move armies.