Context: In a group of guppies, some individuals have a gray body and others have a golden 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 golden body.
Nessie, a guppy from this group, has a gray body. Nessie has two alleles for a gray body.
Based on this information, what is Nessie's phenotype for the body color trait?
A. a gray body
B. BB
From the given choices, choose the correct answer and respond with the letter of that choice.

A