A 55-year-old patient with asthma presents with worsening symptoms despite treatment with a low-dose inhaled corticosteroid (ICS) and a long-acting beta-agonist (LABA). The patient’s lung function tests indicate persistent airflow limitation. What is the most appropriate step-up therapy for this patient? • A) Increase the dose of inhaled corticosteroids (ICS) • B) Add a leukotriene receptor antagonist (LTRA) to the treatment regimen • C) Switch to a combination inhaler containing medium-dose ICS/LABA • D) Prescribe a short-acting beta-agonist (SABA) for symptom relief
