Following the Birth of His Baby Brother, Five-Year-Old Ermen Feels

Following the birth of his baby brother, five-year-old Ermen feels that he is no longer the center of his parents' attention. He resents this fact, but he is unable to express his dislike for his sibling for fear of being reprimanded. When Ermen is left to take care of his baby brother, he often resorts to hurting him but shows intense affection toward the baby in the presence of his family. According to Freudian psychoanalytic theory, this is an example of ________.

A) reaction formation
B) displacement
C) sublimation
D) projection