Hi!
The answer is D.both B and C .
Hope it helps and have a wonderful day!
When a species is in a stable and favorable environments.
Biogeographic isolation : Isolation through distribution of Species in geographic space and time
so , one of the answer is The isolation of two populations of the same species
By doing this, decrease the chance of any cross breeds between species, which eventually will led to Speciation
<span>Out of a flatworm, sponge, coral, or crab, the complex invertebrate is a crab. Hope this helps, good luck </span>
