The appearance of cities in Mesopotamia has been linked to all of the following factors except
a. the presence of military conflict
b. economic competition
c. the outgrowth of increased agricultural productivity
d. the building of irrigation systems
e. the decrease in social problems and pollution
Question 2
Which feature of Ubaid society likely influenced the development of community organization and cooperation?
a. the construction of massive irrigation systems
b. the development of extensive trade contacts
c. the development of an institutional bureaucracy
d. the rise of a full-time military
e. the development of a writing system
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