Mekdes Suffers from Dysthymia and Has Been Struggling with the Symptoms

Mekdes suffers from dysthymia and has been struggling with the symptoms for several years.Sometimes she also experiences increased symptoms of a major depressive episode at the same time.What is it called when major depression and dysthymia happen at the same time?

A) depressive personality disorder
B) depresogenic disorder
C) double depression
D) major depression with psychotic features