What is the maximum number of extensions authorized per enlistment?

The correct choice is two extensions authorized per enlistment because military regulations typically stipulate that sailors may request extensions to their enlistment contract for various reasons, including personal or professional development, or to continue serving in their current assignment. Allowing a maximum of two extensions ensures that service members have the opportunity to extend their commitment to active duty while also maintaining operational readiness and personnel management within the Navy. This policy provides a balance, enabling service members to make decisions about their careers while also facilitating the Navy's needs for manpower and planning.

Other options, such as one, three, or four extensions, do not align with standard military practices regarding enlistment extensions, as policies have been established to limit the number of extensions to ensure efficient personnel management and to encourage service members to transition to their next phase of career or personal life after their initial commitments.