单项选择题
A customer has the following equipment installed in their data center：
（1）an IBM BladeCenter H chassis
（2）two power supplies
（3）six HS22V blades
（4）three Nortel 1/10 GB ESMs The retail customer purchased a new HX5 with MAX5.
Which of the following must be added to install the HX5 with MAX5？（）
A.Two additional power supplies
B.Fibre Channel （FC） switches and SAN storage
C.A Nortel 1/10 GB ESM
D.SSD for the HX5