Which Statement by the Nurse Is Correct Regarding Treatment with Methadone

Which statement by the nurse is correct regarding treatment with methadone (Dolophine) ?

A) Methadone (Dolophine) can only be safely administered for 1 month.
B) Methadone (Dolophine) is only administered when the client is tempted to use illegal drugs.
C) Methadone (Dolophine) can only be administered by IV.
D) Methadone (Dolophine) treatment continues for many months or years,until the patient decides to enter a total withdrawal treatment program.