A 35-year-old man has asthma symptoms more than twice a week and uses his salbutamol inhaler 4-5 times per week. He has no prior ICU admissions. According to contemporary CTS guidance for mild asthma, which is the preferred controller strategy?AContinue salbutamol as needed onlyBStart regular inhaled corticosteroid (ICS) twice daily plus as-needed salbutamolCUse as-needed salbutamol-ipratropium combination onlyDUse as-needed low-dose budesonide/formoterol as both controller and relieverEStart daily oral prednisone at low doseCheck my answer