A 60-year-old woman with schizophrenia has been stable for eight years on a second-generation antipsychotic. She is distressed because she has developed movements in her lips, tongue, and fingers that are noticeable to others. Which of the following options are evidence-based to treat this patient's tardive dyskinesia?
a. Add an anticholinergic medication
b. Add a VMAT2 inhibitor
c. Both A and B
d. Neither A nor B
