Which of the following would be a valid course of action for managing ricochet hazards during firing exercises?

Employing safety measures such as barriers is a valid course of action for managing ricochet hazards during firing exercises because it actively reduces the risk associated with projectiles that may bounce off surfaces and travel outside designated safe zones. Barriers can be designed to absorb the impact of bullets or deflect them away from areas where personnel or equipment might be at risk, enhancing overall safety during training exercises.

In contrast, postponing the exercise indefinitely would prevent valuable training from occurring without addressing the underlying hazards. Conducting exercises only at night does not effectively manage ricochet risks since these hazards can still exist regardless of the time of day. Ignoring existing hazards would be irresponsible and could lead to accidents or injuries, which is contrary to the goal of ensuring safety during any military operation.