Which of the following terms refers to a person's overall sense of who they are, made up of beliefs, attitudes and opinions of themselves and is a key component in identity development?

A. Role performance: This refers to how individuals fulfill the expectations of their roles in life (e.g., student, parent), not their internal identity. B. Body image: Body image is how a person perceives their physical appearance, which is a part of self-concept but not the whole. C. Self-esteem: Self-esteem is the value one places on themselves. It is a component of self-concept, but self-concept is broader. D. Self-concept: Self-concept encompasses an individual’s thoughts and feelings about themselves as a person, including identity, self-esteem, and role perception.