Improvements in transportation and communication during the fi rst part
of the 19th century aff ected economic relations between regions of the
united states by
(a) making the regions more interdependent
(b) making the regions more self-suffi cient and independent
(c) making industrial regions economically dominant over agricultural
regions
(d) making agricultural regions economically dominant over industrial
regions
(e) furthering individual states’ ability to regulate interstate commerce

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.

adopted the practice of proskynesis, a persian court custom that involved bowing down and kissing the hand of others, depending on their rank.