Crises occur when an individual:
Correct Answer: D
Rationale: The correct answer is D because crises arise when an individual experiences a stressor and perceives their coping strategies to be ineffective. This is supported by the fact that crises involve a sense of overwhelm and inability to manage the situation effectively. Choices A and B focus on the presence and perception of stressors, but without considering the effectiveness of coping strategies. Choice C, lack of support systems, is not the defining factor in determining a crisis; it is the individual's perception of their ability to cope that leads to a crisis. Therefore, D is the most appropriate choice as it directly relates to the individual's ability to handle the stressor effectively.