The principle of states' rights, that states have sovereignty in their own affairs without interference from the federal government, has been invoked to

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.

hello,

your answer whould be d