Confirmation as two buttons replacing one with previous interaction

Recently heard an idea to show confirmation buttons directly in place of an element(button), that had interaction, that led to confirmation.

The question is should the button be replaced with or maybe confirmation buttons should be added below. Not quite sure.

Maybe it would be enough, to leave first button text as text so that person would remember, what he is confirming/rejecting.

Example: http://plnkr.co/edit/KKdPlPVYuyhNK154Xstc?p=preview