Under what circumstances should an administrator prefer local VLANs over end-to-end VLANs？（）

• A、Eighty percent of traffic on the network is destined for Internet sites.
• B、There are common sets of traffic filtering requirements for workgroups located in multiple  buildings.
• C、Eighty percent of a workgroup’s traffic is to the workgroup’s own local server.
• D、Users are grouped into VLANs independent of physical location.
• E、None of the other alternatives apply