Context: In a group of fruit flies, some individuals have a gray body and others have a black body. In this group, the gene for the body color trait has two alleles. The allele for a gray body (B) is dominant over the allele for a black body (b).
A certain fruit fly from this group has the homozygous genotype bb for the body color gene.
Based on this information, what is this fly's phenotype for the body color trait?
A. a gray body
B. a black body
Pick the correct answer from the listed options and provide the letter of the selected option.

B