What do new concussion protocols in high school sports aim to do?

New concussion protocols in high school sports primarily aim to reduce the likelihood of athletes playing with a head injury. These protocols involve recognizing the signs and symptoms of concussions, implementing mandatory rest periods, and requiring medical clearance before an athlete can return to play. The focus on these measures is crucial, as they help ensure that young athletes do not risk further injury by continuing to participate while still affected by the symptoms of a concussion. This is particularly important in high school sports, where the long-term effects of head injuries can be significant, and young athletes may not always self-advocate or recognize the seriousness of their condition.

The other options, while related to sports health and safety, do not capture the primary goal of concussion protocols. Encouraging more physical activity and promoting better mental health among athletes are beneficial outcomes of participating in sports but aren't specific objectives of concussion protocols. Similarly, while reducing injury rates is a relevant concern, the real emphasis of these protocols is on preventing athletes from returning to play while still experiencing symptoms of a concussion. Therefore, the correct answer highlights the protective measures implemented to prioritize the health and safety of young athletes in the context of head injuries.