The Fossils of a New Species of Reptile Are Found

Multiple Choice

The fossils of a new species of reptile are found in deposits dating to the Permian period.Later,scientists discover that fossils of the species changed somewhat over time,and can be found in deposits dating from the Permian period all the way up to the Cretaceous period.The fossils vary from one continent to another,but many seemingly intermediate forms are found,and the fossils are spread over most continents.The scientists' observations most strongly support which evolutionary models?

A) allopatric speciation
B) punctuated evolution
C) adaptive radiation
D) both allopatric speciation and adaptive radiation
E) gradualistic evolution