A region with high dental caries and historically mild iodine deficiency is designing policy. Which integrated strategy best synthesizes prevention of both issues while minimizing risks?

Add both extremely high fluoride and extremely high iodine to municipal supplies to ensure everyone gets maximum benefit, then manage any resulting toxicities via outpatient clinics.

Discourage any population-level interventions and rely exclusively on individual dental visits and dietary counseling since community measures always produce more harm than benefit.

Implement community water fluoridation at recommended concentrations and maintain voluntary iodized salt distribution, combined with surveillance for fluorosis and monitoring iodine status, plus targeted iodine supplementation for pregnant women.

Prioritize mandatory iodized salt at very high iodine concentrations to eliminate all thyroid issues and delay water fluoridation indefinitely because fluoridation has no role in caries prevention.