How did Qin Shihuangdi organize and rule a large empire? O He relied on local leaders to oversee the territories.
He set up a central government with a bureaucracy.
He appointed family members to leadership positions.
He reorganized the feudal system to give the aristocracy po

He reorganized the feudal system to give the aristocracy power.

Explanation:

I am pretty sure this is the answer correct me if I'm wrong though.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.