Did living in a river valley allow mesopotamians to have fresh water, food supply, and fertile soil?

yes it did

A river provides the inhabitants with a dependable source of water for drinking and agriculture. Further benefits include fishing, fertile soil due to annual flooding, and ease of transportation. The first great civilizations, such as those in Mesopotamia and Ancient Egypt, all grew up in river valleys.

answer; ///i do believe that the correct answer is (d); ///athens had a small population;

whole lotta ptsd going on