The author mentions the extinction of the dinosaur...

Câu hỏi: The author mentions the extinction of the dinosaurs in the 2nd paragraph to emphasize that

A. the cause of the dinosaurs’ extinction is unknown

B. actions by humans could not stop the irreversible process of a species’ extinction

C. not all mass extinctions have been caused by human activity

D. Earth’s climate has changed significantly since the dinosaurs’extinction