Final answer:
The nurse advises the client to take a sitz bath and keep the surgical area clean and dry post-vulvectomy to promote healing and prevent infection, as maintaining a dry environment lessens bacterial and yeast growth.
Step-by-step explanation:
After a simple vulvectomy, the nurse instructs the client to take a sitz bath and keep the area clean and dry. The reason for these measures is c) To promote healing and prevent infection. Postoperative care is crucial to ensure optimal recovery; a sitz bath can help reduce pain and inflammation, while maintaining cleanliness can prevent the growth of bacteria that might lead to an infection. Keeping the area dry helps maintain a less favorable environment for the growth of organisms that could potentially cause vaginitis, as bacteria and yeasts thrive in moist environments. Therefore, by following these instructions, the patient can aid in the healing process and minimize the risk of postoperative complications.