75-year-old woman with a 50 pack-year history of tobacco use presents to her primary care physician with a complaint of worsening shortness of breath over the past 6 months. She has no documented history of asthma or COPD. Which symptom is most consistent with the diagnosis of COPD?

A. Dyspnea that is progressive, persistent, and worse with exertion.
B. FEV1/FVC greater than 70% of predicted.
C. Chronic cough present only at night.
D. COPD Assessment Test (CAT) score of 5.