A client asks a nurse about the differences between major depressive disorder (MDD) and dysthymia. Which of the following responses by the nurse is accurate?

Choice A rationale: This statement is incorrect. Major Depressive Disorder (MDD) is typically more severe than dysthymia and is characterized by recurrent episodes of severe depression lasting at least two weeks. Choice B rationale: This statement is incorrect. Dysthymia is not characterized by alternating episodes of mania and depression. It is a chronic, low-grade depressive disorder. Choice C rationale: This statement is incorrect. Dysthymia can impair social and occupational functioning, similar to MDD. Both conditions can have a significant impact on a person's daily life. Choice D rationale: This statement is accurate. Dysthymia is a chronic depressive disorder that lasts for at least two years but is generally less severe than MDD. It is characterized by persistent, milder symptoms of depression.