Which of the following is primarily responsible for mentoring and training junior officers?

The role of mentoring and training junior officers primarily falls to commissioned officers. This responsibility is crucial as commissioned officers possess the leadership experience, knowledge of military operations, and understanding of the service's values and culture needed to effectively guide junior officers. They are in positions where they can directly influence the development of junior officers both in professional skills and in instilling the military's ethos.

Commissioned officers serve as role models, helping to navigate complex situations and providing advice on career progression, leadership tactics, and decision-making. This mentorship is fundamental to ensuring a strong and competent future leadership within military ranks. While senior enlisted personnel can offer valuable insights and guidance based on their experience, the primary focus of training and mentoring junior officers lies with commissioned officers, given their direct leadership roles and responsibilities in the chain of command.