A nurse is reinforcing teaching with the guardian of an infant who has seborrheic dermatitis of the scalp. Which of the following instructions should the nurse include?

"When patches are present, it indicates that your infant has a systemic infection."

"you can use petroleum to help soften and remove patches from your infant's scalp."

"You should avoid washing your infant's hair while patches are present on the scalp."

When patches are present, you should keep your infant away from others."