In which ways did the Indus river help the Harappan civilization thrive A. their river provided fertile farmland and good trade routes
B. the river helped make the harappan people good swimmers and sailor
C. the river flooded the cities and poisoned well water

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.