A 28-year-old with moderate persistent asthma has frequent symptoms despite low-dose ICS-formoterol as maintenance and reliever. According to U.S. focused updates, which step-up is appropriate?AAdd long-acting muscarinic antagonist and stop formoterolBUse SMART (medium-dose ICS-formoterol as both maintenance and reliever)CSwitch to SABA-only therapy as neededDAdd theophylline instead of LABAEUse high-dose ICS plus chronic oral steroidsCheck my answer