addEventListener to what exactly?

programming flash
1

i want to affect childMC movieClip, but any of these will give me the same rezults, or at least i think :smiley:

addEventListener(Event.ENTER_FRAME, onEFrame);
stage.addEventListener(Event.ENTER_FRAME, onEFrame);
parentMC.addEventListener(Event.ENTER_FRAME, onEFrame);
parentMC.childMC.addEventListener(Event.ENTER_FRAME, onEFrame);

i presume the best practise is the last one?