Which of the following is a common feature of borderline personality disorder?

The correct choice highlights the hallmark trait of borderline personality disorder (BPD), which is characterized by significant instability in personal relationships, self-image, and emotional regulation. Individuals with BPD often experience intense and fluctuating emotions, leading to dramatic changes in their self-perception and how they relate to others. This instability can result in tumultuous relationships, where the individual may alternate between idealizing someone and feeling anger or disappointment towards that person.

In contrast, the other options do not accurately represent the traits associated with BPD. Emotional stability and resilience contradict the emotional volatility found in BPD. A clear and consistent identity is also at odds with the identity disturbances common in this disorder, where individuals may struggle to have a stable sense of self. Lastly, strict adherence to societal norms does not characterize BPD, as individuals with this disorder may exhibit impulsive behaviors and challenges in conforming to societal expectations as a result of their emotional struggles. Thus, recognizing instability in relationships and self-image as a defining feature provides crucial insight into understanding borderline personality disorder.