A 10-year-old child with a known history of asthma presents to the clinic with increased coughing, wheezing, and chest tightness, especially at night. The nurse explains that these symptoms are related to the underlying pathophysiology of asthma. Which of the following best describes the primary pathophysiologic processes occurring during an asthma exacerbation?

A. Bronchial smooth muscle relaxation and increased surfactant production is incorrect because asthma exacerbations are characterized by bronchoconstriction, not relaxation. Surfactant production is not the primary issue in asthma. B. Acute upper airway infection leading to mucus obstruction in the sinuses is incorrect because while infections can trigger exacerbations, asthma itself is a lower airway disease involving the bronchi and bronchioles, not the sinuses. C. Collapse of alveoli due to surfactant deficiency and impaired gas exchange is incorrect because this describes respiratory distress in premature infants (e.g., neonatal respiratory distress syndrome), not asthma. D. Chronic airway inflammation, bronchoconstriction, and increased mucus production is correct because asthma is a chronic inflammatory disorder of the airways. During an exacerbation, inflammation causes airway edema, bronchial smooth muscle constriction narrows the airway, and excess mucus further obstructs airflow, leading to symptoms like wheezing, cough, and chest tightness.