When performing a skin and nail exam on an older adult female client, the nurse notes that she has longitudinal ridges on her fingernails. What does this finding indicate?

A. Longitudinal ridges on the fingernails are a common finding in older adults and are typically considered a benign, age-related change. B. Psoriasis is a chronic skin condition that can affect nails, causing pitting, discoloration, and abnormal growth patterns, but not typically longitudinal ridges. C. Chronic obstructive pulmonary disease (COPD) is a lung condition and does not cause longitudinal ridges in the nails. D. A fungal infection would more likely cause discoloration, thickening, or crumbling of the nails rather than longitudinal ridges.