A customer with a well-known brand wants to make sure they have a Green decision in their next IT infrastructure investment.   How can IBM Cool Blue help this customer？ （）

A、Providing tools to plan， monitor， manage， and reduce power consumption.

B、Reducing cooling requirements by running CPUs at lower speeds.

C、Using smart system design to create high-power servers.

D、Adapting existing solutions like the Rear Door eXpander.