Your patient is a 22-year-old college student complaining of abdominal pain. She is alert and oriented, although somewhat uncomfortable. Which of the following should be your first action?
A. Perform a physical examination.
B. Palpate the patient's abdomen for tenderness and guarding.
C. Take the patient's roommate aside and ask about the patient's medical history.
D. Ask the patient to describe the pain and find out if she has other complaints.