Which of the following actions should be taken if the victim is unresponsive?

When dealing with an unresponsive victim, the appropriate course of action includes a series of critical steps that prioritize safety and the chance of recovery. The correct process begins by checking for breathing. This is essential because it helps determine whether the victim is in need of immediate life-saving measures, such as CPR.

Calling for help is also a crucial action, as it ensures that emergency medical services are on their way to provide professional assistance. In many cases, while one person checks for breathing or begins CPR, another person should contact emergency services to expedite professional medical intervention.

If the victim is found to be unresponsive and not breathing, it necessitates the immediate performance of CPR to maintain circulation and oxygenation until professional help arrives. Therefore, the actions of checking for breathing, calling for help, and performing CPR work in unison to provide the best chances for the victim's survival. Taking all these steps simultaneously ensures a comprehensive response to a severe medical emergency, making 'All of the above' the best choice.