Final answer:
Preventative measures can significantly reduce the risk of school shootings, but claiming they can reduce the risk to zero is false due to the unpredictability of human behavior and various contributing factors.
Step-by-step explanation:
The statement that preventative measures, if implemented with 100% compliance, can reduce the risk of a school shooting to zero is false. There are many factors that contribute to such acts of violence, including access to firearms, mental health issues, and societal influences. Recommendations for preventative measures include increased gun control, improved mental health care, and better security in schools. However, while these measures can certainly help reduce the occurrence and impact of school shootings, claiming they could completely eliminate the risk is an overstatement. It is simply not possible to guarantee 100% safety as there will always be unpredictable elements at play.