During a Health History Interview of a Patient Complaining of Recent-Onset

During a health history interview of a patient complaining of recent-onset impotence, which question is most appropriate for the nurse to ask to identify a potential cause of the manifestation?

A) "Have you been treated for disorders in the past?
B) "Does this occur often?"
C) "How does your partner feel about this problem?"
D) "Are you on any medications?