The correct answer is D. Staphylococcus aureus.

While many superficial skin infections can be possible in atopic dermatitis, the most common organism is Staphylococcus aureus. Colonization by Staphylococcus aureus may be present in up to 90% of patients with atopic dermatitis.

The other organisms, including Cutibacterium acnes, Herpes simplex virus, poxvirus, Streptococcus agalactiae, and Streptococcus pyogenes may be present in skin infections of patients with atopic dermatitis; however, they are much less likely compared with Staphylococcus aureus.

References:

Wang V, Boguniewicz J, Boguniewicz M, Ong PY. The infectious complications of atopic dermatitis. Ann Allergy Asthma Immunol. 2021;126(1):3-12.