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Nafsadh. "File:Map of Fertile Crescent.svg." Wikimedia Commons. Wikimedia, 22 May 2011. Web. 3 Feb. 2016. <;.

Which of the following are the BEST explanations for why civilization developed in these areas and why these areas still remain the most densely populated locations in this region?

I. Long growing season
II. Moderate temperatures
III. Reliable sources of fresh water
IV. Fertile soils


I and IV only.


II and III only.


I, III, and IV only.


II, III, and IV only.


I, II, III, and IV.

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