When the Nurse Is Assessing a 42-Year-Old Woman, the Patient

When the nurse is assessing a 42-year-old woman, the patient states that she is using topical fluorouracil (Efudex, Fluoroplex) to treat actinic keratoses on her face. Which additional information will be most important for the nurse to obtain?

A) Method of birth control the patient is using
B) History of extensive sun exposure by the patient
C) Length of time the patient has used the medication
D) Appearance of the treated areas on the patient's face