Dr. Kabir, an emergency room doctor, is starting to evaluate a patient who has a limp of the right leg. What should Dr. Kabir do first?

A.
Ask the patient to describe the leg pain.
B.
Order an x-ray of the leg.
C.
Prescribe physical therapy.
D.
Research other cases where patients have experienced similar leg pain.
E.
Contact an orthopedic specialist.