Question: Identify the statement that is true about mass extinctions. Choose one: A. Mass-extinction events are times in the Earth's history when few species evolve. B.

Identify the statement that is true about mass extinctions.

Choose one:

A.  Mass-extinction events are times in the Earth's history when few species evolve.

B.  The mass extinction of over two-thirds of the species on the Earth was the result of largevolcanic eruptions in Hawaii. 

C.  The mass extinction of dinosaurs occurred at the Permian-Triassic boundary.

D.  A mass extinction may happen when a comet or asteroid impact starts achain of events that blocks sunlight for weeks or even years.

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