Context: In a group of cows, some individuals have horns and others do not. In this group, the gene for the horns trait has two alleles. The allele for not having horns (H) is dominant over the allele for having horns (h).
Major is a cow from this group. Major has the homozygous genotype HH for the horns gene.
Based on this information, what is Major's phenotype for the horns trait?
A. not having horns
B. having horns
Select the correct answer from the given choices and respond with the letter of the chosen option.

A