A customer has asked the System x Sales Specialist to provide a solution that meets the following requirements： -- 4U rack-dense server -- 4 quad-core processors -- 32 GB of memory -- 4 Internal SAS hard drives with RAID 5 support -- Redundant Power Supplies -- 7 PCI-E slots available A competitor presented the customer with a solution comparable to a Dell PowerEdge 4-socket server. Which of the following should the System x Sales Specialist present as an advantage over the competitor’s solution？ （）

A. x3255
B. x3655
C. x3755
D. x3850 M2