Which Statements About the Lake Victoria Cichlid Fishes Are True

Which statements about the Lake Victoria cichlid fishes are true? Check all that apply.

A) The adaptive radiation of the estimated 300 species of cichlid fish was very rapid and took place during the last 200,000 years.
B) The adaptive radiation of the Lake Victoria cichlids may have resulted from a key evolutionary innovation.
C) Speciation of the Lake Victoria cichlids was mainly sympatric.
D) The diversity of the Lake Victoria cichlids continues today because the lake is devoid of predators.
E) Many of the Lake Victoria cichlids have very specialized adaptations that allow them to occupy diverse habitats within the lake.