This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Factors responsible for the development of multidrug resistant pneumonia are all, EXCEPT: \nSelect and explain. \nA. Widespread use of potent oral antibiotics, B. Earlier transfer of patients out of acute-care hospitals to their homes, C. Increased use of outpatient IV antibiotic therapy, D. Underlying lung cancer', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Factors responsible for the development of multidrug resistant pneumonia are Widespread use of potent oral antibiotics Earlier transfer of patients out of acute-care hospitals to their homes or various lower-acuity facilities Increased use of outpatient IV antibiotic therapy General aging of the population More extensive immunomodulatory therapies Ref: Harrison, E-18, P-2130.', 'role': 'assistant'}]