Which permission allows a reviewer to view documents?

The ability to allow a reviewer to view documents is tied specifically to the "Analytics Index - View" permission. This permission grants access to the indexed analytics data, which includes the ability to view the relevant documents needed for analysis.

In general, permissions are often designed to segregate capabilities very precisely. The "Analytics Index - View" specifically indicates access to the analytics portion of the system, where critical data and documents that have been processed and indexed for analytics purposes can be reviewed. This is essential for tasks such as assessing the quality of the data, ensuring the relevance of documents in a project, and making informed decisions based on the analyzed data.

On the other hand, the other options either provide broader permissions that include editing or project management capabilities, which are more than just viewing rights. They may allow interaction with more features of the system, which isn’t necessary solely for document viewing tasks. Therefore, the focused nature of the "Analytics Index - View" permission makes it the correct choice for granting document viewing capabilities to a reviewer.