Which of the Following Would Be an Example of Primary

Which of the following would be an example of primary prevention?

A) A state-run HMO sets up a walk-in clinic to reduce people's reliance on hospital emergency rooms.
B) After it becomes clear that Frank's "social drinking" is really problem drinking, Frank's wife gets rid of all the alcohol in the home so their teenagers can't start experimenting.
C) Morgan is enrolled in a diabetes support group to assist her in managing her condition.
D) The various associations attempting to reduce spinal cord injuries lobbies congress to pass bicycle helmet laws for children.