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 having horns (h) is recessive to the allele for not having horns (H).
Booster is a cow from this group. Booster has the homozygous genotype hh for the horns gene.
Based on this information, what is Booster's phenotype for the horns trait?
A. having horns
B. not having horns
From the given choices, select the correct answer and reply with the letter of the chosen option.

A