On VNX Unified series X-blade, which is the correct cabling configuration for the 4-port 8 Gb FC I/O module in slot 0?
A. Two ports for tape backup and two for SP A and SP B back-end connectivity.
B. All four ports connected to SP A and SP B for high availablity.
C. Two ports for tape backup and two for external SAN replication.
D. Four ports for NDMP tape backup.