The primary factor that makes an event a crisis is the:
Correct Answer: C
Rationale: The correct answer is C because the primary factor that makes an event a crisis is the ineffectiveness of one's usual coping strategies. When an event overwhelms an individual's ability to cope with it using their usual strategies, it can lead to a crisis. Choice A is incorrect because the type of loss alone does not determine if an event is a crisis. Choice B is incorrect as the nature of stress is subjective and can vary among individuals. Choice D is incorrect because the preexistence of a stress-related mental illness is not necessarily a prerequisite for an event to be considered a crisis.