Rhoda Miller Has Returned to the Clinic 72 Hours Following

Rhoda Miller has returned to the clinic 72 hours following a tuberculin skin test with an induration of about 5 to 6 mm at the administration site. She is visibly upset and states, "I can't believe I have TB!" Which statement by the nurse is appropriate?

A) "You'll need to put on a mask and wear it whenever you are around other people."
B) "The doctor will prescribe Isoniazid for you to take for the next 3 months."
C) "This finding does not confirm TB; it may indicate a recent exposure to tuberculosis."
D) "We'll need to do a chest x-ray. This may be falsely positive because of your history of diabetes."