The dinosaurs and many other animals became extinct at the end of the
A)Cambrian period.
B)Permian period.
C)Cretaceous period.
D)Pleistocene epoch.

Question

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The dinosaurs and many other animals including marine reptiles and ammonites became extinct at the end of the Cretaceous period, around 65 million years ago, likely due to a combination of factors such as asteroid impact, volcanic activity, and climate change. The Cambrian period was over 400 million years ago and saw the emergence of many new animal groups. The Permian period saw a mass extinction event that affected both marine and terrestrial life around 250 million years ago. The Pleistocene epoch saw the extinction of large mammals such as woolly mammoths and saber-toothed tigers, but not the dinosaurs.

The Dinosaurs and Many Other Animals Became Extinct at the End