Context: This passage describes the xeroderma pigmentosum trait in humans:

In a group of humans, some individuals have xeroderma pigmentosum and others do not. In this group, the gene for the xeroderma pigmentosum trait has two alleles. The allele E is for not having xeroderma pigmentosum, and the allele e is for having xeroderma pigmentosum.
Mabel, a human from this group, has xeroderma pigmentosum. Mabel has two alleles for having xeroderma pigmentosum.
Based on this information, what is Mabel's phenotype for the xeroderma pigmentosum trait?
A. having xeroderma pigmentosum
B. ee
Choose the right answer from the options and respond with its letter.
Answer: A