Hands-only CPR was designed for those who are not trained or feel uncomfortable delivering mouth-to-mouth breaths. It doesn't replace traditional CPR.
Explanation:
Hands on will keep the heart beating and for short periods keep the oxygen already in the blood flowing if continues to long without breathes there's an increased risk of brain damage
I am not 100% sure but I believe it's A. a deck of cards based on my logic. A baseball and a coffe mug is too big and an open palm can vary in size too much.