In an Excavation You Notice That near the Surface There

Multiple Choice

In an excavation you notice that near the surface there are multiple strata in which you find the remains of multiple trilobites with the same type of exoskeleton.Beneath this is a layer where you see an individual with this type of exoskeleton in addition to many with a differing type of exoskeleton.Farther beneath this layer you find multiple strata containing the remains of trilobites with the second type of exoskeleton.This indicates which of the following?

A) It shows a period of stasis,followed by a punctuated speciation event,followed by another period of stasis.
B) It indicates that two species of trilobites have always existed in this particular location.
C) It marks the beginning of an adaptive radiation of trilobite species.
D) It indicates a gradual evolution of trilobites.