You respond to a residence for a patient with a severe leg injury following an accident with a chain saw. When you arrive, you find the patient, 44 years old lying supine in the backyard. He has a partial amputation of his right lower leg that is actively bleeding. The patient is conscious and breathing adequately, however, he is restless and his skin is diaphoretic. Your first treatment should be to:
a. assess the rate and quality of his pulse
b. immediately evaluate his airway
c. apply direct pressure to the wound
d. administer 100% oxygen