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OpenStudy (anonymous):

Which of these innovations was used in the Inca Empire and the Roman Empire? building aqueducts to carry water over gorges constructing rope bridges over canyons building floating gardens on marshes constructing an extensive network of roads @kriscoin

OpenStudy (kriscoin):

A

OpenStudy (anonymous):

it says its wrong

OpenStudy (kriscoin):

Okay. Try Rope bridges.

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