In what model of the universe did philosophers of the middle ages bellieve

The philosophers during the middle ages believed that the geocentric model of the Universe was the one that was true.

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 actual correct answer is c. taxes.

factories are actually the second biggest but on your optian list its taxes.