Of the Following Patients Receiving Treatment for Depression, Who Is

Of the following patients receiving treatment for depression, who is most likely to be a candidate for electroconvulsive therapy?

A) Ang, who has a mild case of depression
B) Bobbie, who has a moderate case of depression
C) Courtney, who has a severe case of depression that seems to be responding to drugs and cognitive-behavioral therapy
D) Damien, who has a severe case of depression that has not responded to other forms of treatment
E) Edgar, who is suffering from schizophrenia