Token Economies Have Been Applied in Therapeutic Settings

Token economies have been applied in therapeutic settings. Which of the following is an application described in your text.

A) Patients suffering from severe depression were given tokens for sharing positive, uplifting thoughts; with the tokens, they could purchase minutes of free individual therapy.
B) Patients with extreme phobias earned points when facing the feared object; with the points, they could purchase time for stress relief meditation.
C) Anorexic patients were given points at weigh-in; with the points, they could purchase activity rewards.
D) Schizophrenic patients in residential treatment were given points for taking their prescribed medications; with the points, they could purchase entertainment rewards.