A 30-year-old man with a 2-month history of productive cough and 4 kg weight loss is found to have a right upper lobe cavitating lesion on chest X-ray. You suspect pulmonary tuberculosis. What is the most appropriate initial diagnostic test?AThree early morning sputum samples for acid-fast bacilli and molecular testingBBronchoscopy with biopsy as first-lineCRoutine throat swabDSerum interferon-gamma release assay aloneEAbdominal ultrasoundCheck my answer