Context: In a group of cats, some individuals have a hairy body and others have a hairless body. In this group, the gene for the body hair trait has two alleles. The allele for a hairless body (b) is recessive to the allele for a hairy body (B).
Oliver is a cat from this group. Oliver has the homozygous genotype bb for the body hair gene.
Based on this information, what is Oliver's phenotype for the body hair trait?
A. a hairless body
B. a hairy body
Pick the correct answer from the listed options and provide the letter of the selected option.

A