Triple

Target entity: Uruk period
Context triple: [Early Dynastic period, follows, Uruk period]

• A. Uruk period chosen
  The Uruk period was an early phase of Mesopotamian history (c. 4000–3100 BCE) marked by the rise of the first cities, monumental architecture, and the earliest known writing.
• B. Third Dynasty of Ur period
  The Third Dynasty of Ur period was a late third-millennium BCE Mesopotamian era marked by a powerful Sumerian state centered in the city of Ur, known for its centralized bureaucracy, extensive cuneiform record-keeping, and significant cultural and legal developments.
• C. Kassite period
  The Kassite period was a phase in Mesopotamian history (c. 16th–12th centuries BCE) when the Kassite dynasty ruled Babylonia, overseeing a stable, long-lasting regime marked by administrative continuity, religious patronage, and extensive cultural and diplomatic ties across the Near East.
• D. Proto-Elamite period
  The Proto-Elamite period was an early Bronze Age phase in southwestern Iran marked by the emergence of one of the earliest writing systems and complex urban societies preceding the Elamite civilization.
• E. Ubaid period
  The Ubaid period was a prehistoric era in southern Mesopotamia marked by the emergence of the first settled farming communities, distinctive painted pottery, and the foundations of later Sumerian urban civilization.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.