A nurse is explaining electroconvulsive therapy (ECT) to members of a depression support group. Which statement would indicate understanding?
a. "ECT is a painless therapy using electric shocks to induce seizures."
b. "ECT is only used as a last resort when other treatments fail."
c. "ECT helps by increasing neurotransmitter levels in the brain."
d. "ECT is only effective for certain types of depression."