What is the primary responsibility of a Unit Commander?

The primary responsibility of a Unit Commander is to maintain overall readiness, welfare, and performance of the unit. This encompasses a wide range of duties that ensure the unit functions effectively and efficiently. A Unit Commander's role involves not only ensuring that soldiers are well-trained and ready for missions but also looking after their welfare, morale, and personal development. This holistic approach is critical for mission success and maintaining a high-performing unit.

In addition, while the other responsibilities, such as ensuring compliance with Army regulations, overseeing training schedules, and managing logistical support, are important aspects of a commander's duties, they are generally considered as parts of the larger responsibility of ensuring the unit's overall readiness and performance. Thus, option C encapsulates the comprehensive nature of what a Unit Commander is primarily tasked with.