An autistic patient with Class II malocclusion who has difficulty cooperating plays basketball. Which appliance recommendation is most appropriate?

Correct answer: A. A custom athletic mouthguard for protection during sport

• A. Correct. For a contact-sport athlete with behavioral/cooperation limitations, a protective custom mouthguard is the practical, low-burden priority to prevent traumatic injury.
• B. Incorrect. Complex fixed appliances demand high cooperation and frequent adjustments that may be difficult here.
• C. Incorrect. An expander treats transverse problems and requires activation/compliance, not the immediate need.
• D. Incorrect. Headgear is highly compliance-dependent and poorly suited to this patient.

Note: The source listed 'sports guard or orthodontic retainer.' For a basketball player, the protective sports guard is the best single answer.