When Alonzo became the target of bullying at school, he first felt angry, then betrayed when he realized a childhood friend was one of the bullies. Instead of fighting back, he acted as if nothing was wrong. This is an example of:

Suppression

Explanation:

Suppression: In psychology, the term suppression is determined as an individual's act of stopping himself or herself from feeling or thinking about something. However, suppression is being considered as ineffective because even if an individual tend to hold back or suppress his or her emotions, for example, guilt or anger, that feelings or emotions is said to get back or return within a period of time.

In the question above, the correct answer is suppression.