[多项选择]A startup company recently lost their critical database due to hardware failure on a Windows 2003 4-way processor server running 32-bit applications and an out-dated backup due to a narrow backup window.  To prevent this situation from happening again， the solution proposed must be cost effective， scale to 16-way and allow for future storage expansion.  Which TWO of the following options should the consultant recommend？（）
A. Implement Snapshot feature of Storage Manager.
B. Implement Flashcopy feature of Storage Manager.
C. Provide remote volume mirroring （RVM） feature of Storage Manager.
D. Implement MSCS clustering on an x455 attached to a shared Fibre DS4000 SAN fabric.
E. Implement MSCS clustering on an x445 attached to a shared Fibre DS4000 SAN fabric.