Based on the map, which statement best summarizes the Inca’s use of roads to administer and expand their empire?
Roads were limited to coastal regions of the Inca Empire because travel across mountains was too difficult.
Roads connected only major cities, such as Cusco and Machu Picchu, to provide protection from invasion.
Roads connected all part of the Inca Empire, allowing for communication, trade, and military deployments.
Roads were used to connect the Inca Empire to other South American civilizations.