After placing a small rock in her mouth, a 7-month-old girl begins to choke. you are on scene within minutes and find her unresponsive in her mother’s arms. you attempt to provide ventilation with the bag-valve mask, but are unsuccessful. your next action would be to:________.
a) attempt ventilation with a pocket mask.
b) administer five chest thrusts.
c) provide five abdominal thrusts.
d) start cardiopulmonary resuscitation.