The Nurse Finds a Patient Lying on the Bathroom Floor

The nurse finds a patient lying on the bathroom floor.The patient is unresponsive and has a pulse but is not breathing.What should the nurse do first?

A) Give 2 breaths using mouth-to-mouth without a barrier device
B) Give 2 breaths using a mouth-to-mouth with barrier device and watch for chest movement
C) Give 2 breaths using a bag-mask device
D) Start chest compressions until an AED is available