Multiple users access a multimedia VOD application at different bit rates. Which prefetch policy should be selected for the LUNs on the background N8500 cluster...

Multiple users access a multimedia VOD application at different bit rates. Which prefetch policy should be selected for the LUNs on the background N8500 clustered NAS storage system?

A. No prefetch B. Constant prefetch C. Intelligent prefetch D. Variable prefetch