The correct answer is C because the metadata field specifically intended to record the identity associated with the most recent save operation is Last Saved By. Microsoft's support documentation for inspecting Office file properties lists standard document properties such as Author and other descriptive fields, and in forensic practice Office metadata commonly distinguishes the original creator from the user who most recently saved the file. The Author field may identify the original creator or default profile owner, but that is not necessarily the person responsible for the latest modification. Revision Number tracks version increments, and Total Editing Time reflects duration rather than identity. CHFI v11 includes analysis of Word, PowerPoint, and Excel files and their metadata, so candidates are expected to know which property best answers a specific attribution question. When the dispute concerns who performed the most recent save rather than who created the spreadsheet, the most relevant embedded metadata property is Last Saved By. That field directly supports attribution of the latest document-save action. ( support.microsoft.com )