单选题A customer has purchased an IBM BladeCenter H chassis and needs the following servers：  --Two HS21 blade servers each with 8GB memory and 2 drives   --Two HS21 blade servers each with 24GB memory and 2 drives   --Two LS21 blade servers each with 2GB me

A customer has purchased an IBM BladeCenter H chassis and needs the following servers：  --Two HS21 blade servers each with 8GB memory and 2 drives   --Two HS21 blade servers each with 24GB memory and 2 drives   --Two LS21 blade servers each with 2GB memory and 2 Hot-Swap SCSI drives   How many total server bays will be required for this configuration？（）