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
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 
Select and explain. 
A. Increased dead air space, B. Increased vital capacity, C. Decreased PCO2 in the blood, D. Decreased anteroposterior diameter
A: Increased dead air space
Answer: A: Increased dead air space 
Explanation: None