Which instruction states that STA-21 students cannot use the Navy's Tuition Assistance benefits?

The correct choice indicates that BUPERSINST 1780.1 provides the relevant instruction stating that STA-21 students are ineligible to utilize the Navy's Tuition Assistance benefits. This instruction outlines the policies and regulations pertaining to education and training for personnel, including specific stipulations concerning financial assistance programs like Tuition Assistance.

Understanding this instruction is crucial for STA-21 students who may seek further education while serving. By clearly stating the restrictions on Tuition Assistance, BUPERSINST 1780.1 helps individuals navigate their educational financing options, ensuring they are aware of the limitations that apply to their particular program. This level of clarity is essential for service members to make informed decisions about furthering their education while balancing their commitments within the Navy.

The other choices, while related to procedural guidance and educational resources, do not specifically address the Tuition Assistance eligibility for STA-21 students, making them less relevant to this question.