Which of the following is a principle of maintaining audit work documents?

Comprehensive and Detailed In-Depth Explanation:

Completeness ensures that all necessary audit evidence, observations, and findings are properly documented, which is critical for traceability and accountability in an audit.

While transparency and fair presentation are principles of auditing, completeness is specifically related to maintaining audit work documents, as required in ISO 19011:2018, Clause 6.5.4 (Preparing Audit Work Documents).