Which of the following is true of all four civilizations-India, China, Egypt, and Sumer? Select all

They developed in river valleys. They developed irrigation systems. They invented plumbing systems. They believed in many gods. They were located between two rivers. They established trade routes.

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9 February, 10:06

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Stephen Price · Answer 1

I think it's either They established trade routes, Or they develop irrigation systems ...

Which of the following is true of all four civilizations-India, China, Egypt, and Sumer? Select allThey developed in river valleys. They developed irrigation systems. They invented plumbing systems. They believed in many gods. They were located between two rivers. They established trade routes.