Sumerians were known for two inventions:
irrigation, that is bringing water to crops that would otherwise not have access to it
and writing: cuneiform, one of two first writing systems on earth (the other being hieroglyphs).
natural harmony through non action
Answer:
D. A subcontinent
Explanation:
India is typically called a subcontinent due to its rather large size and its position.
Both A and C
A. To memorize dates, people, and events
C. To recognize historical patterns
If you have to choose one, I would go with C.