The customer is having a problem adding LUNs from a SAN-attached DS5020. The LUNs are
showing up multiple times. The hosts are running Windows 2008 R2 Enterprise.
How can this situation be resolved?

A.
Install RDAC for DS5020

B.
Check the default HBA settings

C.
Install IBM MPIO Device Specific Module (DSM)

D.
Install SDDDSM drivers and update HBA firmware

Explanation: