-How Does the Distribution Shown on the Map of Alleles

-How does the distribution shown on the map of alleles for the B blood type support the hypothesis that there are no biological races of humans?

A) All human groups show the same frequency of this allele.
B) A distinct frequency pattern of this allele is found in each human group.
C) A gradient of frequency of the allele is found from its origin in Asia outward to Europe.
D) There's no pattern with respect to frequency of this allele throughout Asia and Europe.