正解:B
In Azure, you can move resources between resource groups as long as the resource type is supported for move operations. Virtual Networks (VNETs) are supported for move operations, so you can move the "VNET1 - Virtual Network" resource to RG2.
The other resources, such as "W10_OsDisk" (Managed Disk), "W10" (Virtual Machine), and
"VNET3 - Virtual Network" (Classic Virtual Network), may have limitations or dependencies that prevent them from being moved. Classic resources, like the Classic Virtual Network, have more restrictions on moving compared to Azure Resource Manager (ARM) resources.