You are designing a solution for Certkiller .com using a DL720 as the backup target. During the process, you discovered that the solution will require more back-end ports than this model initially provides. How can you increase the number of back-end ports?

A.
Convert unused front-end ports to target mode

B.
Use a DL740 instead of a DL720

C.
Install additional back-end cards

D.
Convert unused front-end ports to initiator mode