The best strategy for lessening the risk of developing cancer from the options provided is to avoid tobacco. Tobacco use is one of the leading causes of cancer and is linked to various types, including lung, mouth, throat, and more. While cancer cannot be completely prevented, adopting a healthy lifestyle—including avoiding tobacco—can significantly reduce your risk.
Drinking enough water and eating a low-fiber diet are not directly associated with cancer prevention. In fact, a high-fiber diet is often recommended for overall health.