A 68-year-old smoker presents with a persistent cough, haemoptysis, and weight loss. A chest X-ray shows a suspicious mass in the right upper lobe. What is the best next step in confirming the diagnosis?AA. CT chest with contrastBB. Sputum cytologyCC. Bronchoscopy with biopsy or CT-guided biopsyDD. MRI scan of the brainEE. PET scanCheck my answer