All of the following statements support the hypothesis that humans cannot be classified into biological races except:

A. There is more genetic diversity within a racial group than average differences between racial groups;

B. Alleles that are common in one population in a racial group may be uncommon in other populations of the same race;

C. Geneticists can use particular SNP alleles to identify the ancestral group(s) of any individual human;

D. There are no alleles found in all members of a given racial group;

E. There is genetic evidence of mixing among human populations occurring thousands of years ago until the present.