How should a cadet respond when greeting a commissioned officer?

A cadet should respond to a commissioned officer by using "Sir" or "Ma'am" as this demonstrates respect and adherence to military customs and courtesies. This form of address is not only a sign of professionalism but also maintains the hierarchy that is essential in military structure. Properly addressing officers helps to foster a positive and respectful environment within the ranks.

While other forms of acknowledgment, such as a nod or salute, may be part of the interaction, they do not carry the same level of respect as verbally addressing the officer. Simply not speaking does not fulfill the expectation for engagement and respect in military interactions. Saluting is important as well, but it is generally accompanied by a verbal greeting to show acknowledgment and respect. Therefore, using "Sir" or "Ma'am" is the most appropriate response when greeting a commissioned officer.