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Which of these innovations was used in the Inca Empire and the Roman Empire? A. Building aqueducts to carry water over gorges

B. Constructing rope bridges over canyons
C. Building floating gardens on marshes D. Constructing an extensive network of roads

User KCL
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the answer is D. Constructing an extensive network of roads

User Therobinkim
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D. Constructing an extensive network of roads
User Aengus
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