A nurse is instructing a client who is newly diagnosed with pulmonary tuberculosis (TB) about the use of antitubercular medications. Which of the following information should the nurse include in the teaching?

A. A typical course of treatment involves 6 to 9 months of consistent medication use is correct because clients with pulmonary tuberculosis must adhere to long-term combination therapy for at least 6 months to effectively eradicate the infection and prevent resistance. B. Medications will need to be taken until the Mantoux test is negative is incorrect because the Mantoux test may remain positive for life after TB infection, regardless of treatment success. C. The client's family will also need to take medications to prevent infection is incorrect unless family members test positive for latent TB; they are not automatically treated without testing. D. Medications will need to be taken for the rest of the client's life, even if the client feels better is incorrect because TB treatment has a defined course (6–9 months), not lifelong therapy.