Concept:
Mesopotamian civilization developed between the Tigris and Euphrates rivers. It is associated with city-states, temples, cuneiform writing, gods and goddesses, irrigation, and shifting settlements.
Step 1: Check statement A.
Ur was associated with the Moon God.
So, statement A is correct.
Step 2: Check statement B.
Inanna was a Mesopotamian goddess associated with love and fertility.
So, statement B is correct.
Step 3: Check statement C.
Constantine was a Roman emperor, not a Mesopotamian ruler.
So, statement C is incorrect.
Step 4: Check statement D.
Mummies are associated with Egyptian civilization, not Mesopotamian kings.
So, statement D is incorrect.
Step 5: Check statement E.
Villages and settlements in Mesopotamia were affected by environmental and agricultural conditions, and relocation occurred.
So, statement E is accepted as correct.
Thus, the correct statements are:
\[
A,\ B,\ E
\]
Hence, the correct answer is:
\[
\boxed{\text{(C) A, B and E only}}
\]