Option B. Hash database lookup is the best answer because the question is specifically about automating the review of a very large number of files and identifying potential evidence more efficiently. CHFI v11 includes hash analysis , identifying suspicious or known files through hashes , and the use of forensic tools to streamline evidence examination across large datasets.

A hash database lookup allows the investigator to compare file hashes against known-good or known-bad sets, quickly filtering out benign system files and highlighting files that are suspicious, altered, or already associated with malicious activity. This is exactly the kind of automation that reduces manual effort in a large-scale file-system analysis.

File carving is useful for recovering deleted content, but it does not primarily automate file triage. File system timeline helps reconstruct activity order, and disk imaging is an acquisition task rather than a feature for rapidly identifying potential evidence. Therefore, under CHFI forensic-analysis principles, the most effective TSK feature for automating identification of relevant evidence is hash database lookup .