A customer wants to deploy a new CRM application on an 8-way Intel-based server.  They plan to upgrade to a 16-way server six months later， because the CRM application will support a larger number of processors.  After the upgrade， they will need more I/O slots to support the SAN storage and LAN bandwidth requirements.  They are considering either the IBM x445 or the HPQ DL740/DL760G2.  Which TWO of the following choices are the key competitive advantages of the IBM x445？（）

• A、x445 supports PCI-X adapters
• B、x445 can scale up to 16 processors
• C、x445 supports redundant power supplies
• D、x445 can expand I/O by adding the RXE-100
• E、x445 comes standard with systems management software