Which factor is most likely to negatively affect a client's self-concept?

A. Receiving a promotion generally enhances self-concept and self-esteem. B. Achieving personal goals supports a positive self-concept. C. Developing a chronic illness can challenge a person’s body image, role performance, and sense of identity, often negatively impacting self-concept. D. Strong family support typically strengthens self-concept by providing emotional stability and affirmation.