You Have Arrived on the Scene of a 17-Year-Old Male

You have arrived on the scene of a 17-year-old male patient with a gunshot wound to the thigh. Police are on the scene. There is significant ongoing hemorrhage from the wound. The patient is screaming for someone to help him. Which of the following should you do first?

A) Control hemorrhage with direct pressure.
B) Perform a rapid trauma assessment.
C) Ask the police if they have searched the patient for weapons yet.
D) Begin high-concentration oxygen administration.