What should you do if you see someone with a loaded rifle after receiving the command STOP?

When you receive the command STOP, it is a clear indication of a potentially dangerous situation on the shooting range. In this context, raising your hand to alert an instructor is the appropriate action because it ensures that trained personnel are informed about the safety risk. The instructor will then be able to take necessary measures to control the situation and ensure everyone's safety.

This option prioritizes the well-being of all individuals present. By alerting an instructor, you contribute to maintaining a safe shooting environment, which is essential in any firearms training program. This proactive step helps prevent accidents or injuries associated with mishandling a loaded rifle.