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History 20 Online
OpenStudy (anonymous):

Which would best explain the decline of an early civilization? A. A river and its tributaries change course over time. B. People settle near a river where it empties into the sea. C. The natural features in an area include high mountains, large deserts, and oceans. D. A large river floods annually.

OpenStudy (ryamorgan284):

d and b

OpenStudy (anonymous):

@ryamorgan284 It's only one. It would say 'choose all answers that are correct' if it was more than one.

OpenStudy (ryamorgan284):

d

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