When Two Species Contain Identical or Nearly Identical Molecules Such

When two species contain identical or nearly identical molecules such as proteins, this suggests

A) genetic modification has occurred to the populations.
B) the two species share a common ancestry.
C) the two species are in fact only one species displaying divergent evolution.
D) the two species are in fact only one species displaying convergent evolution.
E) the two species overlap in niches and likely share a common diet.