The Nurse Is Performing Tuberculosis (TB)skin Tests in a Clinic

The nurse is performing tuberculosis (TB) skin tests in a clinic that has many patients who have immigrated to the United States.Which question is most important for the nurse to ask before the skin test?

A) "Is there any family history of TB?"
B) "How long have you lived in the United States?"
C) "Do you take any over-the-counter (OTC) medications?"
D) "Have you received the bacille Calmette-Guérin (BCG) vaccine for TB?"