The rhythmic sequence at which your heart beats is called a sinus rhythm, it is when the atria and ventricles of the heart contract.
Starting by know the 5 links, these links are:
Recognition.
Activation of the emergency response system.
Immediate high-quality CPR.
Rapid defibrillation.
Advanced live support and post-arrest care.
From these 5 links, you can see that the prevention of typical causes of cardiac arrest is not here.
Thus, making Prevention of the typical causes of cardiac arrest your answer to this question.
Hope this helps :)))
He has looked into some online communities where he can find help with job leads.
In front of windows or even outside try staying away from open doors as well
Hope this helps, good luck ;)
I thinks it is C not sure hough