Significant mass extinctions occurred during which of the following peroids?
A) Pleistocene, Ordovician, and Triassic
B) Ordovician, Triassic, and Jurassic
C) Triassic, Permian, and Cretaceous
D) Triassic, Permian, Cretaceous, Pleistocene, Ordovician, and Devonian
E) Ordovician, Triassic, Jurassic, Silurian, Eocene, and Oligocene
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