A 65-year-old man with COPD (FEV1 45% predicted, frequent exacerbations) is on short-acting bronchodilators only. According to Canadian Thoracic Society COPD pharmacotherapy guidance, which change is most appropriate?AContinue short-acting bronchodilators onlyBInitiate long-acting muscarinic antagonist (LAMA) plus long-acting beta-agonist (LABA) and consider inhaled corticosteroid addition if exacerbations persistCStart inhaled corticosteroid monotherapyDUse oral theophylline as first-line controllerERely solely on systemic steroids during exacerbationsCheck my answer