What was the earliest know civilization

(a) sumer

(b) mesopotamia

(c) egypt

(d) civitas

(A) Sumer

Explanation:

Sumer was the earliest know civilization. They were an ancient civilization that were located between the Tigris and Euphrates river. In their time, they would succeed in learning different languages, and building structures for housing. The Sumber civilzation was formed in c. 4500 and ended in c. 1900 BC.

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