URGENT!
Scientists discover two populations of mice on either side of a
major river. The two populations have almost identical genes, but
the mice from one side cannot breed with the mice from the other.
This is most likely because
Select one:

O both species of mice lived on both sides but owls killed one population on each side.

O the river separated one species of mice into two different species.

O the similar habitat caused two species to become genetically
similar

O two different species of mice migrated to the river from different
directions