Why Do the Galápagos Islands and the Hawaiian Islands Have

Multiple Choice

Why do the Galápagos Islands and the Hawaiian Islands have so many endemic species of flies and birds? Check all that apply.

A) There are numerous islands in each archipelago.
B) There is adequate distance between islands to allow divergence.
C) The founder effect was common when islands were colonized.
D) Each bird or fly species has many common ancestors.