Context: In a group of horses, some individuals have a black coat and others have a reddish-brown coat. In this group, the gene for the coat color trait has two alleles. The allele L is for a black coat, and the allele l is for a reddish-brown coat.
Sterling, a horse from this group, has a black coat. Sterling has two alleles for a black coat.
Based on this information, what is Sterling's genotype for the coat color gene?
A. LL
B. a black coat
Select the correct answer from the given choices and respond with the letter of the chosen option.

A