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.