Which types of military service are covered by the policy?

The policy covers various types of military service, which is why the correct answer includes drills, training, and active duty as required by proper authority. This comprehensive approach ensures that personnel engaged in different facets of military service receive the same protection and considerations under the policy.

By incorporating drills, the policy recognizes the importance of regular training activities that personnel participate in to maintain their readiness and skills. Including training activities also acknowledges the various forms of service beyond just active duty, reinforcing the policy's broader scope.

Active duty is clearly a significant component, but it doesn't encompass all the types of service that the policy intends to address. Each of these components—drills, training, and active duty—plays a crucial role in the overall mission readiness of military personnel, demonstrating the necessity for the policy to encompass all these aspects rather than limiting coverage to only one form of service.

This comprehensive coverage supports the idea that military service personnel may engage in various capacities, and each of these should be recognized and protected under the policy framework.