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': 'A pulmonary disorder causes the alveoli to break down and coalesce into large air spaces. The lungs also lose elasticity and compliance is increased. A person who suffers from this disease will have \nSelect and explain. \nA. Increased dead air space, B. Increased vital capacity, C. Decreased PCO2 in the blood, D. Decreased anteroposterior diameter', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]