Which of the following are benefits of front-end interconnect (shared) I/O modules? (Multiple choice)

Which of the following are benefits of front-end interconnect (shared) I/O modules? (Multiple choice)
A . Host path loss prevention in the event of controller failure controller hard/software upgrades, and even single FC link between host and storage
B . Storage sysadmins are needed to ensure the multipath software is servers runs online before controller upgrades
C . Fewer front-end modules and hst links needed
D . Direct data dispatch to the distributed controller through front-end modules in one engine controller enclosure

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Answer: ACD