Final answer:
When performing CPR, it is recommended to switch positions and allow someone else to take over compressions and breaths about every 2 minutes to prevent fatigue among rescuers.
Step-by-step explanation:
When performing CPR, you should switch positions and allow someone else to take over compressions and breaths about every 2 minutes (option B). This is important because performing CPR can be physically demanding and it is crucial to prevent fatigue among rescuers. Switching positions allows for fresh rescuers to take over and maintain effective compressions and breaths.
Learn more about CPR and switching positions