Prospective buyers asked the licensee representing them if it would be a good idea to check the property they wish to purchase for radon. The licensee's best response would be to tell the buyers that

This statement is misleading because radon levels can vary significantly even within small geographical areas. Without specific testing, it is impossible to determine whether radon poses a risk in any given location, making this response inadequate and potentially dangerous for the buyers.

This choice incorrectly downplays the risks associated with radon exposure. While smoking is a major risk factor for lung cancer, radon exposure is dangerous for all individuals, regardless of smoking status. The presence of radon can pose a health risk even to non-smokers, so this response is not appropriate.

This statement is false; radon is an odorless gas, which means it cannot be detected without appropriate testing. Relying on smell to assess radon presence is a serious oversight, as it may lead to undetected health hazards in the home.