Answer:
B. "The improvements in productivity in early agricultural societies enabled more complex societies to develop" is the best option.
Explanation:
This improvement in productivity mostly came from the division of labor, which allowed people to do things other than farm.
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Religion? Hinduism features a social caste system
Answer:
I would say option 2 because people could have different opinions on weather it was effective or not, which would allow you to make it into an argumentative essay.