When the nurse collects objective data, which finding requires immediate follow-up?

A. Moist nasal mucosa: This is generally a normal finding and does not usually require immediate follow-up unless there are other symptoms suggesting infection or other issues. B. Cerumen in the ear: While cerumen can impact hearing, it is typically not an urgent issue and can be managed with appropriate ear care. C. Enlarged lymph node in the neck: Enlarged lymph nodes can indicate an underlying infection or malignancy, especially if persistent or accompanied by other symptoms, thus requiring immediate follow-up. D. Acne lesions on the face and upper chest: Acne is common and usually not an urgent concern unless it is severe or causing significant distress.