Your companys network environment includes the hypervisors described in the following table. You manage the Microsoft Hyper-V Server 2008 server by using Microsoft System Center Virtual Machine Manager （VMM） 2008. You need to be able to manage all the hypervisors by using VMM. Which two actions should you perform？（）
- AUpgrade from VMM 2008 to VMM 2008 R2
- BUpgrade the VMware ESX 3.0 host servers to VMware ESX 3.5
- CUpgrade the VMware ESX 3.0 host servers to VMware ESX 4.0
- DInstall VMware VirtualCenter 2.5 in the existing VMware ESX environment