THE AUTHOR MENTIONS THE EXTINCTION OF THE DINOSAURS IN THE 2ND PARA...
2. The author mentions the extinction of the dinosaurs in the 2nd paragraph to emphasize that _____________. A. Earth's climate has changed significantly since the dinosaurs' extinction B. the cause of the dinosaurs' extinction is unknown C. actions by humans could not stop the irreversible process of a species' extinction D. not all mass extinctions have been caused by human activity
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