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 B is for a gray body,
and the allele b is for a black body.
A certain fruit fly from this group has a gray body. This fly has two alleles for a gray body.
Based on this information, what is this fruit fly's genotype for the body color gene?

(A) a black body
(B) a gray body
(C) BB
(D) bb