A nurse is assessing a client who has been receiving electroconvulsive therapy. Which of the following findings indicates the treatment is effective?

A. Electroconvulsive therapy (ECT) is primarily used to treat severe depression, and its effectiveness is demonstrated through an improvement in depressive symptoms such as mood, energy levels, and interest in daily activities. B. While ECT may have some effect on panic attacks, its primary indication is for severe depression. Therefore, a reduction in panic attacks is not the best indicator of the treatment's effectiveness. C. Seizures are part of the therapeutic process in ECT, and the goal is not to reduce their frequency but to alleviate psychiatric symptoms. D. Decreased fear of heights may be beneficial for some clients, but it is not a direct indicator of the effectiveness of ECT, which targets depression rather than specific phobias.