Parents report their 3-year-old child appears restless at night and frequently scratches her anal area. What action by the nurse is best?

A. While reviewing hygiene practices is important, it does not confirm the cause of the nighttime anal itching, which could be due to pinworm infection. B. Limiting clothing is not an effective diagnostic or treatment measure for suspected pinworm infection. C. A stool sample is not reliable for diagnosing pinworms, as eggs are laid around the anus at night, not in stool. D. The cellophane tape test is the preferred diagnostic method for Enterobius vermicularis (pinworm). It involves placing clear tape on the perianal area in the morning to collect eggs for microscopic examination, allowing accurate diagnosis and appropriate treatment.