Emergency Medical Responders have removed a female patient from her bedroom, where she was found lying on her bed with a suicide bag over her head. The bag is removed and you note the woman to be unresponsive, pulseless, and apneic. Given the use of a suicide bag and the presentation of the patient, which of these statements indicates proper initial care?

A) "Do not apply the AED since the arrest was not caused by a cardiac event."
B) "I need someone to assess the patient's blood glucose level."
C) "Let's open the airway manually first."
D) "I need someone to get a pulse oximetry reading immediately!"

C) "Let's open the airway manually first."