A 62 year old ex-smoker with GOLD stage 3 COPD has persistent dyspnoea despite regular short-acting bronchodilator use. He has had two exacerbations requiring steroids in the past year. Which long-term pharmacological strategy is preferred?AStart long-acting muscarinic antagonist or long-acting beta-agonist inhalerBStart inhaled corticosteroid monotherapyCStart oral theophylline as first-lineDStart long-term oral prednisoloneENo escalation is indicatedCheck my answer