What is the best description of the phrase "the glass ceiling"?
fewer women than men rise to positions of power.
women are a smaller percentage of the workforce than men.
women average less pay than men.
women are more likely to raise families than men.

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.