Which statement about relapse prevention is accurate?

Which statement about relapse prevention is accurate?

• A. Usually full-time wear for several months to a year, followed by long-term or indefinite part-time wear as advised by the clinician.
• B. Retainers must be worn only during school hours.
• C. Retainers are unnecessary after treatment.
• D. Retainers must be replaced every month.

Answer: (C)