Answer:
The correct answer is D. Little Peter is using displacement as a defense mechanism. Which means that little Peter is taking out his anger on something else.
Explanation:
Displacement is a phenomenon where emotions are displaced. Emotions are displaced especially the negatives one are transferred from a place of more aggression to a place of less aggression such as an object or human.
In this case, little Peter displaced his aggression and anger by breaking mirror and tearing some wallpaper in his room.
