A patient with a history of asthma reports using their short-acting beta-agonist inhaler more than twice per week. Which is the most appropriate next step to improve asthma control?
A:Increase the dosage of the rescue inhaler
B:Add a long-acting beta-agonist to the regimen
C:Refer to a pulmonologist for further evaluation
D:Add an inhaled corticosteroid to the regimen