6. Significant mass extinctions occurred during which of the following epochs? O A. Triassic, Permian, and Cretaceous B. Triassic, Permian, Cretaceous, Pleistocene, Ordovician, and Devonian O C. Pleistocene,

6. Significant mass extinctions occurred during which of the following epochs?

O A. Triassic, Permian, and Cretaceous
B. Triassic, Permian, Cretaceous, Pleistocene, Ordovician, and Devonian
O C. Pleistocene, Ordovician, and Triassic
D. Ordovician, Triassic, Jurassic, Silurian, Eocene, and Oligocene

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6. Significant mass extinctions occurred during which of the following epochs? O A. Triassic, Permian, and Cretaceous B. Triassic, Permian, Cretaceous, Pleistocene, Ordovician, …

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