Final answer:
Kirby's consideration of his divorce as a disruptive life change exemplifies Lazarus's concept of primary appraisal, assessing the potential stressfulness of an event.
Step-by-step explanation:
Kirby just got divorced and is currently thinking about how disruptive and significant this life change will be for him. According to Lazarus, Kirby's behavior is an example of primary appraisal. This is a term from Lazarus's stress and coping theory, which refers to the stage of appraising an event or situation as to its impact on one's well-being. In this case, the significant life change of divorce prompts Kirby to assess its potential stressfulness and implications for his life.