What feature does FTK offer for multiple-user collaboration?

The correct answer highlights FTK's capability to allow multiple users to collaborate on forensic cases efficiently through case sharing and concurrent user access. This feature is particularly vital in forensic investigations where teamwork and collaboration can significantly enhance the analysis process. With case sharing, users can access the same case file simultaneously, making it easier for them to work together, share insights, and expedite case resolution.

Simultaneous access means that experts can examine the evidence concurrently, discuss findings in real-time, and make collective decisions without the delays typically associated with traditional methods. This collaborative environment fosters a more comprehensive examination of digital evidence, as each user can contribute their expertise without waiting for others to finish their work.

In contrast, other options do not support the collaborative needs of forensic teams. Single user access limits the ability to collaborate effectively, making it unsuitable for environments where teamwork is essential. File versioning pertains more to managing different iterations of files, which doesn't inherently facilitate direct collaboration between team members. Limited access to file directories restricts overall usability and collaboration, as it can hinder the ability to share critical evidence among users actively working on the same case. Therefore, the feature that best represents FTK's collaborative tools is the ability to share cases and allow for concurrent user access.