The army of defeated all the city-states of sumer and conquered northern mesopotamia. (sargon i/kish)

The army of Sargon defeated all the city-states of Sumer and conquered northern Mesopotamia.

The Mesopotamia was the reign of Sargon of Akkad from 2334 to 2279 BCE. In fact, his reign constituted the first ancient multi-national empire of Mesopotamia.

Sargon also conquered parts of Syria, Anatolia, and Elam (western Iran).  The region of the Mesopotamia includes the area that is now eastern Syria, southeastern Turkey, and most of Iraq. Its name derives from a Greek word meaning “between rivers,” which makes reference to the land between the Tigris and Euphrates rivers.

the real answer is b

assessment is the missing word