A company has two x346 servers each attached to their own EXP400 containing 367GB of raw SCSI storage. They want to consolidate their storage infrastructure into a scalable， high availability solution at minimum cost. Which of the following storage solutions best satisfies the customer’s requirements？（）

Add redundant Fibre HBAs to each server and direct attach them to a DS4300 Turbo SAN solution
B. Add iSCSI cards to the servers and direct attach them to a DS300 dual controller model
C. Use clustered NAS solution with redundant gigabit network connections
D. Add redundant Fibre HBAs to each server and attach them to a DS400 dual controller model