Which describes an accomplishment of the persian empire?

The famous accomplishment of the Persian Empire during its most powerful emperor Darius is the enormous expansion of the empire and the mode of rule and the advanced bureaucracy of that time. Namely, the Darius Empire encompassed most of Western Asia, the Northern Caucasus, parts of the Balkans, most of the Black Sea, the Indus Valley, parts of North Africa, including Egypt, East Syria.

He improved the rule by introducing an official Aramaic language at the level of the government,  introduced the unitary monetary system, as well as the introduction of Satraps. The Satraps were the provincial governors elected from these areas, who best understood the habits and customs of the local population, and everything that was happening in the provinces was reported to Darius.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

originally he was supposed to be dead but they wanted to continue the series so they brought him back to life.