The answer is C is b/c sun exposure is completely natural unlike the followin answers.
Don't use tobacco. Using any type of tobacco puts you on a collision course with cancer. ...
Eat a healthy diet. ...
Maintain a healthy weight and be physically active. ...
Protect yourself from the sun. ...
Get vaccinated. ...
Avoid risky behaviors. ...
Get regular medical care.
Answer:
You can think of Free radicals as some exhaust from a combustion engine. Get this picture: If an engine is running, it is throwing off some exhaust. Also, if you want to compare this to other things, you can compare it to the human body, as you digest food, breathe, and as you exercise you're producing free radicals. Just by simply living, you are producing them every single second of your life.
Explanation: