C. Sargon. He was known as Sargon of Akkad and conquered Sumer and much of the surrounding land.
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C. Sargon is the correct answer, as he was the ruler who built a large army and conquered land to form one of the world's first empires, the Akkadian Empire. His rule lasted from approximately 2334 to 2279 BCE and marked significant advancements in military organization and governance. Sargon's conquests unified many Sumerian city-states under a central authority.
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