Paleontological Studies Indicate That, Over Millions of Years

Paleontological studies indicate that, over millions of years,

A) groups of species that have coevolved rise and go extinct together.
B) species that occurred together in the distant past still occur together today; the community has held constant.
C) the extinction of species is not related to the community in which they lived.
D) species seem to come and go individually as niches within a community become available.