Context: In a group of cows, some individuals have solid coloring and others have white spots. In this group, the gene for the coat pattern trait has two alleles. The allele for solid coloring (A) is dominant over the allele for white spots (a).
Moxie is a cow from this group. Moxie has the homozygous genotype aa for the coat pattern gene.
Based on this information, what is Moxie's phenotype for the coat pattern trait?
A. solid coloring
B. white spots
Choose the right answer from the options and respond with its letter.

B