After his baby sister was born, a 6-year-old boy began sucking his thumb and wetting his bed, behaviours he had 'grown out of long before. His behavio

[Kathryn]

#june2020mccqe1

After his baby sister was born, a 6-year-old boy began sucking his thumb and wetting his bed, behaviours he had 'grown out of long before. His behaviour is an example of which one of the following?
(A) Reaction formation
(B) Regression
(C) Acting out
(D) Jealousy
(E) Compensation