Context: In a group of jaguars, some individuals have a black coat and others have a spotted coat. In this group, the gene for the coat pattern trait has two alleles. The allele for a black coat (A) is dominant over the allele for a spotted coat (a).
Hermes is a jaguar from this group. Hermes has the homozygous genotype aa for the coat pattern gene.
Based on this information, what is Hermes's phenotype for the coat pattern trait?
A. a black coat
B. a spotted coat
Answer with the option's letter from the given choices directly.

B