The Nurse Describes the Pathophysiologic Process of an Asthma Attack

The nurse describes the pathophysiologic process of an asthma attack. Place the events in their proper sequence. (Separate letters by a comma and space as follows: A, B, C, D)
A) Inflammatory process in the mast cells of the lungs
B) Increase in edema and mucus production in the bronchioles
C) Release of histamine
D) Narrowing of the airways
E) Exposure to allergen