1. What major development was used by the Inca civilization to unite their empire system? a. Road System b. Paper money c. The Colombian Exchange d. Human Sacrifices

possible the invasion of room could have been avodiable but the people of rome were to stubboron and to wealthy the kingdoms saw them as a threat if they dialred it downa   bit ten i dont think they wouldnt failed   china was not iacvvdoaible they caused war to much and were out of hand therefor that must have happened india i dont really know it could of

d) they were able to slow down colonial settlement.