Answer:
c. pressurize the house
Step-by-step explanation:
Pressurize the house is the best way to prevent radon from entering a home.
Radon is a radioactive gas that can seep into homes through cracks in the foundation or walls. Long-term exposure to radon can increase the risk of lung cancer.
To prevent radon from entering a home, it is important to seal all cracks and openings in the foundation and walls. One effective way to prevent radon from entering a home is to pressurize the house by using a ventilation system that brings in outside air and forces it into the home, creating positive pressure that prevents radon from seeping in through cracks. This system can also help improve indoor air quality by reducing the buildup of other pollutants.
Opening doors and windows or ventilating with inside air may not be as effective in preventing radon from entering the home as pressurizing the house with outside air.