Context: In a group of ornamental gourd plants, some individuals have yellow fruit and others have green fruit. In this group, the gene for the fruit color trait has two alleles. The allele F is for yellow fruit, and the allele f is for green fruit.
A certain ornamental gourd plant from this group has green fruit. This plant has two alleles for green fruit.
Based on this information, what is this ornamental gourd plant's phenotype for the fruit color trait?
A. ff
B. green fruit
Determine the correct option from the provided choices and reply with its corresponding letter.

B