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 from one location to another, and even homes in areas with low radon potential can have high levels due to factors like construction materials and ventilation. Therefore, it is not safe to assume radon is unlikely without proper testing.

This choice incorrectly downplays the risk of radon exposure. While smoking increases the risk of lung cancer, radon itself poses a danger regardless of smoking status. Non-smokers are still at risk for lung cancer due to radon exposure, making testing important for everyone.

This response is factually incorrect, as radon is odorless and cannot be detected by smell. Relying on odor as an indicator of radon presence is dangerous and could lead to unrecognized health risks. Testing is the only reliable method to determine radon levels in a property.