The nonadaptive coping mechanism among the options provided is:
c. Isolation
Isolation as a coping mechanism involves withdrawing from social interactions and avoiding others as a way to deal with stress or difficult situations. While seeking some time alone can sometimes be helpful, excessive isolation can prevent individuals from getting support and help from others, leading to increased feelings of loneliness and worsening of the underlying issue. It can hinder problem-solving and emotional processing, making it a less effective coping strategy compared to seeking social support or using healthy coping mechanisms.