Final answer:
To safely use an AED on a small child or infant whose chest is too small for the pads to not touch, one should place one pad on the upper chest and the other on the back.
Step-by-step explanation:
If there is a risk of the AED pads touching each other on a small child or infant, the correct action is to place one pad on the upper chest and the other pad on the back. This ensures that the electric current passes through the heart effectively. It is not advisable to place them on the stomach, to place them as usual if they would touch, or to reverse the positions on the chest, as these methods would not be effective or safe.