A customer is looking to migrate an existing VNX gateway from a CLARiiON CX-4 backend to a VMAX.
Which migration option mitigates risk and requires the least effort?

A.
Install a new VNX gateway to a VMAX, and use VNX Replicator to migrate the data.

B.
Use SAN Copy to move all VNX LUNs to the VMAX.

C.
Use the file system migration tool in Unisphere.

D.
Use SAN Copy to move control LUNs to the VMAX, and use VNX Replicator to migrate data volumes.