The correct answer is C. Document - Edit. Relativity’s workspace security documentation explicitly states: Use the document Edit permission to tag documents with workspace coding values using layouts. Deciding whether a document is privileged is a coding decision made on the document, typically through a coding layout and fields such as Privileged or Privilege Designation. That activity requires the ability to edit document-level coding values, which is exactly what Document - Edit provides.

The other permissions serve different purposes. Layout - Edit is for editing the layout object itself, not for making coding calls on documents. Field - Edit is for editing field properties and administration, not for reviewers coding documents. Relativity even warns not to assign coding users rights to edit fields or layouts when what they really need is to code documents. Document - Local Access is tied to actions like opening natives in their native applications, downloading, or copying text, not making privilege determinations. Therefore, from an RCA permissions standpoint, the correct permission to let users decide whether a document is privileged is Document - Edit.