Refer to the Map Below

Multiple Choice

Refer to the map below. DNA analysis showed that one species of rat diverged over several thousand years to become two species.Rat species A lived in the Ethiopian biogeographic region, whereas species B lived in the Oriental region.This suggests that the process leading to divergence of the two rat species is

A) dispersal.
B) vicariance.
C) biogeography.
D) converging of land masses.
E) biotic interchange.