Context: In a group of Labrador retrievers, some individuals have black fur and others have brown fur. In this group, the gene for the fur color trait has two alleles. The allele F is for black fur, and the allele f is for brown fur.
Hachiko, a Labrador retriever from this group, has black fur. Hachiko has two alleles for black fur.
Based on this information, what is Hachiko's genotype for the fur color gene?
A. FF
B. black fur
Select the correct answer from the provided options and reply with the letter associated with it.

A