Final answer:
Cole's major depressive disorder is recurrent as his symptoms disappear and then reappear over time, indicating a pattern of recurrence. Long-term treatment is essential for managing recurrent depression.
Step-by-step explanation:
Cole's major depressive disorder is likely recurrent. When symptoms of major depressive disorder dissipate and then reoccur over a period of time, this pattern suggests a recurrence of the disorder. Many people experience such cycles, where periods of remission are followed by the reappearance of depressive symptoms. It's important for individuals with recurrent major depression to continue with long-term treatment and be vigilant about potential relapses. Treatments include psychotherapy, medication like monoamine oxidase inhibitors (MAO inhibitors), and sometimes electroconvulsive therapy or deep-brain stimulation.