I’m working on a psychology discussion question and need the explanation and answer to help me learn.

How do the interactive dynamics between genetic predispositions, epigenetic modifications, early environmental adversities, and subsequent psychosocial stressors contribute to the development of complex post-traumatic stress disorder (C-PTSD) and its heterogeneity in symptom presentation, and what implications does this multifaceted etiology have for personalized treatment approaches?