Which answer best characterizes when mass extinctions occurred in the Phanerozoic Eon?

Question

Question 1 options:

There were no mass extinctions in the eon

There was one mass extinction at the end of the Permian

There were mass extinctions at the end of the Ordovician and Permian

A mass extinction marked the end of each era

Answer 1

There were mass extinctions at the end of the Ordovician and Permian