What Is the Best Explanation of Erikson's Theory of Psychosocial

What is the best explanation of Erikson's theory of psychosocial development during the adolescence period?

A) Cognitive development is cumulative; that is, what is learned is based on what has been known before.
B) The adolescent thinks in the abstract and develops skills to participate in complex problem solving.
C) The adolescent develops many skills during the teen ages, which help adolescents make educational and career choices.
D) The adolescent faces many different decisions during the teen years concerning the future and the adult world.