What must be completed before participating in the Navywide advancement exam?

The correct choice emphasizes that actively completing the Navywide advancement exam itself is a prerequisite for advancement, highlighting the importance of taking the exam as the final step in demonstrating knowledge and readiness for promotion. It is a critical aspect of the Navy's advancement process, ensuring that personnel have met the necessary standards and are assessed adequately in their proficiency and understanding of naval operations and responsibilities associated with their rank.

Other options refer to various preparatory steps or roles that personnel may take on their path to advancement but do not directly address the requirement of having to complete the exam itself to move forward in the promotion process. The advancement exam is designed to evaluate a sailor's knowledge and competence and it's a mandatory step in pursuing any advancement opportunity within the Navy.