Patients with COPD are highly susceptible to pneumonia because:
A. they cannot effectively expel infected pulmonary secretions.
C. their age predisposes them to COPD-related lung infections
B. their immune system is inherently weakened by the disease. .
D. their hyperactive cough reflex leads to alveolar destruction.
Ans: A. they cannot effectively expel infected pulmonary secretions.
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