The Nurse Is Performing a Follow Up Visit with a Patient

The nurse is performing a follow up visit with a patient recently diagnosed with a GOLD 1 classification of COPD. Which statement by the patient indicates the most important compliance with previous patient teaching?

A) "I am attending an exercise class three times a week."
B) "I am including more fresh foods in my daily diet."
C) "I successfully completed a smoking-cessation program."
D) "I am wearing a respiratory filter when I work outside."