A client receives a positive Mantoux tuberculin skin test with an induration measuring 12 mm. The client is asymptomatic and has no history of prior tuberculosis (TB) exposure or vaccination. Which action should the nurse anticipate next?

Schedule a chest x-ray to evaluate for active pulmonary tuberculosis

Instruct the client to begin a full course of antitubercular medications immediately

Repeat the Mantoux test in 3 months to confirm the result

Document the result as negative since the client has no symptoms