While Eating in the Hospital Cafeteria,the Nurse Sees a Visitor

While eating in the hospital cafeteria,the nurse sees a visitor display the "universal sign of choking." Her first action is to:

A) Page a "Code Blue" emergency.
B) Immediately perform five abdominal thrusts.
C) Assess for ineffective breathing by asking, "Are you choking?"
D) Deliver four sharp back blows between the scapulae.