When Examining a Patient's Oral Cavity, the Nurse Notes the Presence

When examining a patient's oral cavity, the nurse notes the presence of white lesions that resemble milk curds at the back of the throat. Which question by the nurse is appropriate at this time?

A) Do you have a productive cough?
B) How often do you brush your teeth?
C) Are you taking any medications at present?
D) Have you ever had an oral herpes infection?