This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lung, Subject name: Surgery
After suffering a severe bout of pneumonia, a 46-year-old renal transplantation patient develops a lung abscess. She has been receiving immunosuppression therapy since her last kidney transplantation 3 years ago. What is the most appropriate treatment? 
Select and explain. 
A. Needle aspiration, B. Urgent thoracotomy, C. Antituberculous therapy, D. Antibiotics and vigorous attempts to obtain bronchial drainage
D: Antibiotics and vigorous attempts to obtain bronchial drainage
Answer: D: Antibiotics and vigorous attempts to obtain bronchial drainage 
Explanation: Antibiotics and vigorous attempts to obtain bronchial drainage will treat the abscess adequately in the majority of cases. Lung abscesses commonly are associated with aspiration pneumonia, where the abscess is found posteriorly. In the presence of an unexplained lung abscess, bronchoscopy is essential to exclude a foreign body or tumor that could cause bronchial obstruction.