An 18-year-old Hispanic woman lives with her father who was recently diagnosed with active TB based on symptoms of fevers, cough, weight loss, a chest x-ray showing a cavitary lesion, and a sputum...

An 18-year-old Hispanic woman lives with her father who was recently diagnosed with active TB based on symptoms of fevers, cough, weight loss, a chest x-ray showing a cavitary lesion, and a sputum sample with acid-fast bacilli. What size PPD skin reaction would be considered positive and mandate treatment for this woman?

A. Any reaction

B. 5 mm

C. 10 mm

D. 15 mm

E. 20 mm