The most complete definition of a civilization is

Aany culture that practices art and religion.
Bthe gathering of humans in farms, settlements, and villages.
Ca social structure based on economic power.
Da complex culture in which a large number of humans share several common elements.

Verified Answer :

The most complete definition of a civilization is a complex culture in which a large number of humans share several common elements. It is also characterized by urban development and also includes domestication of both humans and other organisms, specialization of labor and expansionism.

The answer would be choice d.