The answer is “A”
Explanation:
1. group
2. period
3. noble gases
Sumer<span>Ur, Erech, and Kish were three of the settlements of Sumer, which was the southernmost area of ancient Mesopotamia. The Sumerians are credited for various inventions including early form of writing and diversified irrigation methods which made the city food sufficient.
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\it contrasted with self reliance.
