<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 65-year-old man comes to the physician because of a 10-month history of progressive shortness of breath and a cough productive of a small amount of white phlegm. Bilateral end-expiratory wheezing is heard on auscultation of the chest. Pulmonary function tests show total lung capacity that is 108 of predicted, an FEV1 that is 56 of predicted, and an FEV1:FVC ratio of 62. Which of the following interventions is most likely to slow the decline in FEV1 in this patient?? A: Smoking cessation, B: Breathing exercises, C: Salmeterol therapy, D: Fluticasone therapy, E: Alpha-1 antitrypsin therapy,  <response>: This is a clinical vignette describing a 65-year-old man with a 10-month history of progressive shortness of breath, cough productive of white phlegm, and wheezing on lung exam. Pulmonary function tests show hyperinflation increased total lung capacity, airflow obstruction decreased FEV1 and FEV1FVC ratio. This presentation is most consistent with chronic obstructive pulmonary disease COPD. The question asks which intervention is most likely to slow the decline in FEV1 in this patient.A: Smoking cessation 