Your 5-year-old brother is the baby of the family. When your mother gives birth to another child, your brother begins to soil his underwear, and your mother is forced to put him back in diapers. Which of the following defense mechanisms is he using?

A. reaction formation
B. rationalization
C. regression
D. repression

I think it might be regression.

Hope this helps!

The defense mechanism that the question is asking about is "Regression."

Explanation:

In psychology, "regression" is where we mentally go backward in time,

to an earlier part of our lives.

We start behaving as though we're much younger, than we really are.

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~courtney

what are the options?