Which two events will result in a vSphere 5.x host running a virtual machine that contains an older virtual hardware version? (Choose two)
A. a virtual machine is created on a vSphere 5.x host and virtual for the VM are created on a VMFS3 datastore.
B. a virtual machine was migrated from a vSphere 4.x host.
C. a virtual machine is created on a vSphere 5.x host with a with a vmxnet network adapter.
D. a virtual machine is created on a vSphere 5.x host and attached to an existing virtual disk created with vSphere 4.x
