A 14-year-old patient has been diagnosed with uncomplicated mononucleosis. The nurse practitioner should:

Rationale:
A. A partially vaccinated 4-year-old is at highest risk for pertussis because incomplete vaccination provides suboptimal immunity, leaving the child vulnerable to infection.
B. An infant born at term may have some passive maternal antibodies if the mother was vaccinated, offering partial protection.
C. A child who came in contact with an infected person is at risk, but the degree of susceptibility depends on immunity status. A fully vaccinated child has significantly lower risk.
D. A newborn whose mother received DTaP in the third trimester typically has transplacental antibodies, providing temporary protection during the first few months of life.

Rationale:
A. Tinea capitis, a fungal infection of the scalp, commonly presents with round, scaly patches and broken hairs close to the scalp. It often causes itching and may lead to mild inflammation.
B. Seborrheic dermatitis typically presents with greasy, yellowish scales rather than broken hairs.
C. Trichotillomania is characterized by hair loss due to repetitive pulling, often with irregular patches and no scaling.
D. Alopecia areata presents as smooth, well-demarcated, non-scaly patches of hair loss without broken hairs.