Multiple Choice
It is believed that the two main reasons for mass extinctions in Earth's history have been:
A) Impact of Earth with a large celestial body and human intervention
B) Global warming and human intervention
C) Human intervention and shifting of Earth's continents
D) Global warming and shifting of Earth's continents
E) Impact of Earth with a large celestial body and shifting of Earth's continents
Correct Answer:

Verified
Correct Answer:
Verified
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