Companycom recently ordered a p5 570 and an HMC. Prior to delivery, two additional p5 570 servers were added to the order. Upon installation, the system administrator noticed that they do not have a method to connect the p5 570 servers to the HMC. Which of the following will allow them to connect all servers to the HMC?（）

An 8-port adapter to the HMC
B. A hub for the private network
C. An additional Ethernet card to the HMC
D. An additional Ethernet card for each partitio