This doctor tells her that many well-designed studies suggest that electroconvulsive therapy is effective in the treatment of depression.
Option D is correct
Schizophrenia, depression, and bipolar disorder are the main conditions for which electroconvulsive therapy (ECT) is considered a first-line treatment or a highly effective intervention when other methods haven't worked.
Borderline personality disorder and panic attack disorder are typically treated with other modalities like psychotherapy and medication before considering ECT.