Normal working hours can be extended for which of the following reasons?

Normal working hours can be extended to complete a readiness requirement because maintaining readiness is a crucial aspect of military operations. The military often has to adjust schedules to ensure that personnel are adequately prepared and equipped to fulfill their missions. This includes allowing extra time for specific tasks that contribute to overall operational readiness, such as training for deployments, executing drills, or addressing equipment maintenance needs.

While other reasons might seem valid for extending normal working hours, they do not hold the same priority as readiness requirements. For instance, accommodating personal requests or administrative tasks may not be mission-critical, and while training can be important, it often falls under readiness initiatives. Thus, extending hours specifically for operational readiness is the most justifiable reason among the options presented.