A customer is interested in a power efficient server solution. The Sales Specialist has recommended a BladeCenter solution. The customer debates the price is high compared to rack servers.  Which of the following should the Sales Specialist emphasize to address the pricing difference？（）

• A、Higher rack density that reduces data center footprints
• B、Internal upgrades that only IBM can offer
• C、Total Cost of Ownership （TCO） related to innovative components such as Integrated Switches 
• D、The Rear Door Heat eXchanger that only IBM can offer