You work as a senior administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com. All servers on the ABC.com network have Windows Server 2012 R2 installed， and all workstations have Windows 8 installed. You are running a training exercise for junior administrators.You are currently discussing the Always Offline Mode. Which of the following is TRUE with regards to the Always Offline Mode？（）
- AIt allows for swifter access to cached files and redirected folders.
- BTo enable Always Offline Mode，you have to satisfy the forest and domain functional-level requirements， as well as schema requirements.
- CIt allows for lower bandwidth usage due to users are always working offline.
- DTo enable Always Offline Mode， you must have workstations running Windows 7 or Windows Server 2008 R2.