Who must be qualified in the weapons system and training for their assigned tasks?

The correct choice highlights that Range Safety Officers (RSOs) must be qualified in the weapons system and training for their assigned tasks because they play a crucial role in ensuring safety during live-fire events. RSOs are responsible for monitoring the range activities, enforcing safety protocols, and ensuring that all personnel adhere to training and operational guidelines. Their qualification in the weapons system is essential as it allows them to effectively supervise operations, respond to safety incidents, and provide guidance to all shooters on the range. This expertise directly contributes to the overall safety and success of training exercises.

In contrast, other roles such as Safety Officers, Range Officers, and Range Officer in Charge (ROICs) also have responsibilities regarding safety and operations but may have different operational focuses or supervisory roles that do not necessarily require direct qualification on every specific weapons system in the same detailed manner as RSOs. Understanding the distinct responsibilities of each position helps clarify why the qualification of RSOs is emphasized in this context.