The correct answer would be C. Cardiopulmonary resuscitation, commonly
known as CPR, is a procedure used in an emergency situation. An effort to
manually preserve intact brain function is performed until additional actions
are taken to bring back natural blood circulation and breathing in a person who
is in cardiac arrest. It is immediately performed in those who are impassive
with no breathing or abnormal breathing, for example, those who have just
drowned. Basically, CPR is performed in order to let oxygenated blood flow
through the heart and brain.
