A 5-year-old child with asthma uses a regular low-dose inhaled corticosteroid and a short-acting beta-2 agonist as needed. He continues to have frequent symptoms. According to UK guidelines, what is the next step?AA. Start oral steroids dailyBB. Add a leukotriene receptor antagonist (e.g., montelukast)CC. Add high-dose inhaled corticosteroidsDD. Stop inhaled corticosteroids and switch to a long-acting beta-2 agonistEE. Use intermittent nebulised salbutamolCheck my answer