A customer’s data center has all POWER4+ systems， and they plan to add three new p5-570 systems.  They will be purchasing a new 7310-CR2 HMC to support the POWER5 systems.  What is a key requirement that they need to plan for with the new HMC？（）

• A、A desk， as it not rack mountable
• B、Ethernet connections to the POWER5 systems
• C、Serial connections to the POWER5 systems
• D、USB connections for the keyboard and mouse