Select the Following Statements That Are Related to Mass Extinctions

Multiple Choice

Select the following statements that are related to mass extinctions.

A) A mass extinction occurs when extinctions sharply outpace the formation of new species.
B) Periods of mass extinctions have occurred five times over the history of life on Earth.
C) The most severe mass extinction occurred at the end of the Cretaceous period.
D) The current level of species diversity is so high it is highly unlikely that another mass extinction could occur.
E) During periods of mass extinction,dominant groups of organisms are protected and survive to repopulate.