Kevin is а 22-yeаr-оld cоllege student whо presents with а history of asthma. He is having episodes of respiratory congestion and prolonged wheezing occurring ~3 times per week. He does have an albuterol inhaler that gives him temporary relief. He is using the albuterol at least once daily and more frequently on the days he is having exacerbations. He reports an allergy to ragweed pollen that he has experienced since childhood. Using the most current GINA Guidelines, what is the best initial preferred treatment for Kevin?