ImageStreams in OpenShift provide which capability?

• A. ImageStreams are used to expose routes.
• B. ImageStreams enforce security policies on pods.
• C. ImageStreams track image versions and support promoting images across environments.
• D. ImageStreams provide persistent storage.

Answer: (C)

ImageStreams provide a stable reference to container images by tracking versions and digests from a registry. They let you promote images across environments by using tags (ImageStreamTags) that can be moved or updated as you move from development to test to production. Deployments can watch for changes and roll out automatically when an image in the stream changes. This capability is not about exposing routes, enforcing pod security, or providing storage—that's handled by Routes, security policy features, and PersistentVolumeClaims.