Question: What facilitated the rise of Sumerian cities?

Is By the time of the Uruk period (c. 41002900 BC calibrated), the volume of trade goods transported along the canals and rivers of southern Mesopotamia facilitated the rise of many large, stratified, temple-centered cities (with populations of over 10,000 people) where centralized administrations employed specialized workers. a good answer to this question?

Options are: A. yes. B. no.
A.