A severely distressed patient has bright red rectal bleeding and in lethargic. His pulse is​ 136, respirations are 24​ breaths/min, blood pressure is​ 72/5 mmHg, and SpO2 is​ 5%. His skin is​ moist, pale, and​ clammy, and his mental status is deteriorating. At this​ time, your priority intervention would be​ to:
A. Apply the​ AED, but do not turn it on yet
B. Apply supplemental oxygen
C. Apply pressure over the rectum with sterile dressings to control bleeding
D. Transfer the patient to the stretcher for immediate transport