Respuesta :
The earliest civilizations developed in the river valleys of: "A. the Nile River" and "D. the Tigris and Euphrates Rivers" since these areas were the most fertile--meaning that crops were able to grow far more easily.
Answer:
✔ A) - the Nile River
✔ B) - the Yellow River
✔ D) - the Tigris and Euphrates Rivers
** is the correct answer **
Explanation:
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