Background Extinction Is a Measure of the ____

Multiple Choice

Background extinction is a measure of the ____. ​

A) rate of species turnover at the end of geological eras
B) number of species that suffer extinction at the beginning of geological eras
C) steady rate of species turnover within a lineage throughout most of their evolutionary history
D) lowest rate of species turnover within a lineage observed within a geological era
E) animals that appear in the dense forest