Which Statement Accurately Describes Childhood Asthma

Which statement accurately describes childhood asthma?

A) An obstructive airway disease characterized by reversible airflow obstruction, bronchial hyperreactivity, and inflammation
B) A pulmonary disease characterized by severe hypoxemia, decreased pulmonary compliance, and diffuse densities on chest x-ray imaging
C) A pulmonary disorder involving an abnormal expression of a protein, producing viscous mucus that lines the airways, pancreas, sweat ducts, and vas deferens
D) An obstructive airway disease characterized by atelectasis and increased pulmonary resistance as a result of a surfactant deficiency