The study of human variation on the molecular level has shown that:
A. there is more variation within geographically separated human populations than between them
B. there is more variation between geographically separated human populations than within them
C. different human populations can be assigned to different subspecies
D. both there is more variation between geographically separated human populations than within them and different human populations can be assigned to different subspecies
A. there is more variation within geographically separated human populations than between them
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