A nurse is working in a walk-in clinic. She has been alerted that there's an outbreak of tuberculosis (TB). Which client entering the clinic today is most likely to have TB?

A. A 16-year-old female high school student: While TB can affect people of any age, high school students are generally not considered a high-risk group unless they have known exposure or immunosuppression. Routine exposure in school settings is relatively low. B. A 54-year-old businessman: This client may be at risk depending on travel history or comorbidities, but business professionals typically have better access to healthcare and housing, reducing their baseline risk compared to other populations. C. A 54-year-old businessman: Unless other risk factors are specified (e.g., foreign travel, immunocompromise), this demographic does not represent a high-risk group for TB in an outbreak situation. D. A 43-year-old homeless man with a history of alcoholism: This client falls into a high-risk category for TB due to poor living conditions, potential malnutrition, and compromised immunity related to alcoholism. Homelessness and substance use are well-established risk factors for tuberculosis, especially during outbreaks.