Missouri requires radon disclosure:

A is incorrect because Missouri does have specific radon disclosure requirements. The 'Never' option contradicts Missouri state law, which mandates disclosure for residential transactions. Failing to disclose radon information could result in legal liability for agents and sellers.

C is incorrect because radon disclosure requirements in Missouri specifically apply to residential properties, not commercial ones. Commercial properties have different disclosure requirements, and radon disclosure is not among them under Missouri law.

D is incorrect because Missouri's radon disclosure requirement is statewide and not limited to specific counties. Unlike some environmental hazards that may be location-specific, radon disclosure is required throughout the state for all residential transactions.