Standing in a Fast-Food Line, the Person in Front, While

Standing in a fast-food line, the person in front, while munching on a cookie, begins to cough heavily, takes deep inspirations, and waves his arms around wildly.What should be the nurse's first action?

A) Start rescue breathing as quickly as possible.
B) Start chest compressions as quickly as possible.
C) Perform abdominal thrusts.
D) Do nothing at this point as long as air is exchanged.