Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to limit home radon exposure [title] Find a qualified contractor. [step] Limiting radon in your home will take someone with training and knowledge in mitigation techniques. Ideally, look for a contractor certified by the national radon proficiency program (nrpp) or the national radon safety board (nrsb).

Ending1: The nrsb can help you figure out whether it is safe to home radon in your area. If it isn't safe, be sure to contact the nrsb as soon as possible to find out about the risk factors that also could have a problem with your property. Ending2: These organizations exist to increase their legal rights to decide who can purchase the building. Build protection programs should be reviewed by nrsb before approval to licensing and license contractors to work with nrsb, nrsb, and the nrsb. Ending3: You can find the appropriate contractor by going to your local nrpp website. Click on the link to complete a search. Ending4: These are the only two national organizations in the us that certify radon professionals. [substeps] The us environmental protection agency (epa) suggests that people hire contractors who certified nationally or on the state level.

Answer format: ending1/ending2/ending3/ending4