With Regard to the Treatment of Mood Disorders, Which of the Following

With regard to the treatment of mood disorders, which of the following statements is accurate?

A) Patients do not recover from episodes of major depression without treatment.
B) Delaying or preventing future episodes of major depression is an important treatment goal.
C) After a patient has experienced a major depressive episode and recovered, treatment can be discontinued.
D) Close to 100% of patients with major depressive disorder respond to drug treatment.