Your network environment includes two Windows Server 2008 R2 Hyper-V servers and one VMware ESX 3.5 host server. You are designing a Microsoft System Center Virtual Machine Manager （SCVMM） 2008 R2 implementation to manage your network environment. SCVMM must be able to perform management tasks that require file transfer operations between your VMware server and your Windows servers. You need to configure the ESX host server to ensure that file transfer operations are encrypted， and follow security best practices. What should you do？（）

A. Use the default root credentials as the virtual machine delegate， and enable SSH root login
B. Create a new virtual machine delegate account， add the account as a member of the VMware Administrators role， and enable SSH root login
Create a new virtual machine delegate account， add the account as a member of the VMware Administrators role， and disable SSH root login
D. Use the default root credentials as the virtual machine delegate， and disable SSH root logi