With the Extinction of the Dinosaurs 65 Million Years Ago,multiple

Multiple Choice

With the extinction of the dinosaurs 65 million years ago,multiple niches that the dinosaurs once filled opened up and allowed mammals the opportunity to evolve and exploit those niches.In other words,mammals underwent a(an)

A) sympatric speciation.
B) adaptive radiation.
C) exaptation.
D) behavioral isolation.
E) phylogenetic isolation.