irene, a social worker in a prison for juvenile offenders, decided to implement a program to improve the self-esteem of adolescent prisoners. she hypothesized that the adolescents' aggression was simply a defense mechanism used to shield their low self-esteem. thus, increasing their self-esteem would result in decreased aggression. is irene's approach likely to be effective? group of answer choices yes, improved self-esteem is associated with less externalizing, aggressive behavior. yes, self-esteem can be easily modified and results in dramatic changes in behavior. no, self-esteem cannot be modified so her intervention is likely to be ineffective. no, aggressive people are more likely to already have high self-esteem.