Final answer:
The Radon Disclosure form is signed by both the buyer and the seller in a real estate transaction to provide information on the presence of radon in the property.
Step-by-step explanation:
The Radon Disclosure form is an important document that must be signed by certain parties during a real estate transaction. This document provides information about the presence of radon in the property, which is a naturally occurring radioactive gas that can have health risks if found in high concentrations indoors. According to regulations in many states, the parties that are required to sign the Radon Disclosure are B. the buyer and the seller. While it is not typically required for the agents to sign this specific form, their signatures may be needed on other related documents during the transaction process.