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Mathematics 10 Online
OpenStudy (tylermckinney16):

Earth's history is characterized by unpredictable systems that can't be analyzed invulnerability to anything that humans try to change static conditions that haven't changed since the Earth was formed long periods of fairly stable conditions interrupted by abrupt and major changes

OpenStudy (danjs):

Just guessing, the last one since i know there were a few mass extinction events.

OpenStudy (tylermckinney16):

So you think its D?

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