This passage describes the coat graying trait in horses:
Your hair may turn gray or white as you grow older. Some horses go through a similar process called coat graying as they age. These horses are usually a darker color, such as brown or black, when they are born. Over time, the hairs of their coats lose their original color and become gray or white.
In a group of horses, some individuals have coat graying and others do not. In this group, the gene for the coat graying trait has two alleles. The allele G is for having a graying coat, and the allele g is for not having a graying coat.
Argo, a horse from this group, does not have coat graying. Argo has two alleles for not having a graying coat.
Based on this information, what is Argo's phenotype for the coat graying trait?

gg
Gg
not having a graying coat
having a graying coat