A nurse is teaching a client who has tuberculosis about infection control with her family at home. Which of the following instructions should the nurse include?

Rationale: A. "Before coughing or sneezing, cover your mouth and nose with a tissue.": Tuberculosis is transmitted via airborne droplet nuclei expelled during coughing, sneezing, or speaking. Covering the mouth and nose with a tissue reduces the dispersion of infectious particles into the surrounding air and lowers transmission risk within the household. B. "Wear a high-filtration mask at home when family members are nearby.": High-filtration respirators such as N95 masks are primarily intended for healthcare workers in clinical settings with airborne precautions. In the home environment, emphasis is placed on cough etiquette, adequate ventilation, and limiting close contact during the infectious phase. C. "Make sure family members wear masks whenever they are in the same room as you.": Infection control guidelines focus on the infected individual practicing source control measures and maintaining proper ventilation. Household members are not routinely instructed to wear masks continuously in the home setting unless advised due to high-risk exposure. D. "Return to work after two consecutive sputum cultures are negative.": Clients with active pulmonary tuberculosis are generally considered noninfectious after adequate treatment, clinical improvement, and three consecutive negative sputum smears collected on separate days. Returning to work after only two negative cultures does not meet standard public health criteria.