C. Crossing your arms over your chest. The gesture may be perceived as confident or defensive while the others do not express those things.
Answer:
Chief Complaint: Vomiting. (It is due to the vomiting that the patient's stomach hurts, thus vomiting is the more pertinent complaint.)
Chief Complaint: Headache. (What caused the vomiting and runny nose?)
Chief Complaint: Chest Pain. (Answer to the question "what brought you in today"
C Washing your hands protect themselves and patients.