Edwin was a neglected child in his infancy. Now, at 31 years of age, he is highly cynical about the world and feels that no one can be relied upon. In relationships he is suspicious toward his partner, and these feelings eventually lead to the breakup of the relationship. According to Erikson's psychosocial theory, this indicates that Edwin did not successfully resolve the stage of development, which in turn is causing him to experience in his current developmental stage.

According to Erikson's psychosocial theory, this indicates that Edwin did not successfully resolve the [INFANCY] stage of development, which in turn is causing him to experience [ISOLATION] in his current developmental stage.

Explanation:

In infancy, Edwin was neglected, which, according to Erikson's Theory makes him mistrustful. Judging by the break-up with his gf, Edwin has isolated himself by his own doing, leading to him occupying the Isolation stage of young adulthood.

answer; i believe that the correct answer is (c) ///