a 65 year old patient with a history of COPD presents to the clinic with complaints of continued dyspnea on exertion. the patient reports using SABA inhaler 3-4 times per day for symptom relieve. which of the following treatments should be addd to the patient’s regimen to improve COPD management. a. inhaled cortocosteroid b. long-acting beta agonist c. leukotriene receptor antagonist d. home oxygen