You arrive at a​ restaurant, and as you approach your​ 58-year-old male​ patient, you note that he is sitting at a​ table, panicked and laboring to breathe. As you get​ closer, you note audible​ stridor, and the patient is cyanotic. You feel NO movement of air from his mouth or​ nose; your initial impression would​ be:

A. upper airway obstruction from food.
B. anaphylaxis.
C. asthma.
D. airway obstruction from fluid.