Final answer:
A sailor's signature on an enlisted evaluation report signifies acknowledgment of receipt, not agreement, disagreement, or an appeal of the evaluation.
Step-by-step explanation:
A sailor's signature on an enlisted evaluation report primarily indicates C) Acknowledgment of receipt of the evaluation. The signature does not necessarily mean that the sailor agrees or disagrees with the evaluation, nor does it represent an appeal of the evaluation. It is simply an acknowledgment that the sailor has received and read the evaluation report. It is part of the formal process to ensure that evaluations are conducted fairly and that the evaluated personnel are made aware of their performance assessments.