Final answer:
The correct answer is option C. Mentor and disciplinarian.
Step-by-step explanation:
According to the 1918 BlueJacket's Manual, which served as the handbook for sailors in the United States Navy, the roles of a chief petty officer (CPO) extended beyond specific technical skills. One of the primary objectives of a CPO was to serve as a mentor to junior sailors, providing guidance, training, and support to ensure their professional development and adaptation to naval life.
Additionally, a CPO took on the role of a disciplinarian, maintaining order and discipline among the crew, and ensuring the enforcement of military regulations and standards of conduct. These roles helped to maintain the structure and effectiveness of naval operations during that era.