A customer plans to purchase a p5-570 that will run in SMP mode to host a large financial database on AIX 5.2.  The application is sized for an 8-way 1.65-GHz machine.  They do not currently have an existing HMC that supports p5 machines. This organization experiences unpredictable short-term spikes in processor utilization.  To mitigate the risk to their business， they are interested in IBM’s CoD offering.  In addition to the 8-way system， what else should the pSeries technical specialist recommend to the customer？（）

A.Another p5-570 building block
B.Capacity Backup p5-570 building block
C.Another p5-570 building block and at least one HMC
D.Capacity Backup p5-570 building block and at least one HMC