What is an accurate statement about stretched VLANs?

What is an accurate statement about stretched VLANs?
A . Reduces network bandwidth requirements during VM migration across sites.
B . Requires a change in the VMs’ IP addresses to match the addressing scheme at the other sites.
C . Enables automatic modification of VLAN addresses during VM migration across sites.
D . Supports migration of VMs across sites without the need to change their network configurations.

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Answer: A