Your Hyper-V servers run Windows Server 2008 R2 Standard. You manage the virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You need to ensure that you can migrate child partitions between host servers. What are two possible methods that will allow you to achieve this goal？（）

• A、live migration
• B、SAN migration
• C、quick migration
• D、network migration