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. Which question by the nurse is appropriate at this time?

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