<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 26-year-old woman comes to the emergency room because she had difficulty breathing during an exercise session. She also has a cough and end-expiratory wheezing. Besides these symptoms, she has a normal physical appearance. She has experienced similar breathing problems during exercise in the past, but never during rest. She is afebrile. What is the best treatment in this case?? A: Systemic corticosteroids, B: Short acting β2-agonists, C: Aminophylline, D: No therapy, only avoidance of exercise, E: Long acting β2-agonists,  <response>: This appears to be a case of exercise-induced bronchospasm in an otherwise healthy 26-year-old woman. She experiences wheezing and difficulty breathing during exercise, but not at rest. She has a history of similar episodes. She has no fever or other concerning symptoms. The key findings are exercise-induced wheezing and cough in an otherwise healthy patient. This points to bronchospasm triggered by exercise. Short-acting beta-2 agonists e.g. albuterol are the treatment of choice for acute bronchospasm episodes. They provide rapid relief by relaxing bronchial smooth muscle. Systemic corticosteroids may help prevent future episodes but are not indicated for acute treatment. Aminophylline is a second-line bronchodilator and is not preferred over beta-2 agonists. Avoiding exercise is not a recommended treatment. Long-acting beta-2 agonists are used for maintenance in asthma but are not indicated for acute episodes.B: Short acting β2-agonists 