How did geography affect the development of independent city-states? select all that apply. a. the mountains isolated the city-states. b. the sea separated the city-states. c. the coastal areas were not fertile. d. the plains were barriers. e. the climate was wet in summer.

The correct answer is:  

A and D.  

In ancient Greece, the geography of the land, full of mountains and small valleys, resulted in the construction of different communities within each valley and its surrounding mountains. Those communities would later develop in the independent city-states, called polis, of the Archaic Period.

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