Which statement about the impact of a rolling EPLD upgrade on a Cisco MDS 9000 Series Switch is true?

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Which statement about the impact of a rolling EPLD upgrade on a Cisco MDS 9000 Series Switch is true?
A . All modules on the switch are disrupted.
B . An EPLD upgrade is nondisruptive.
C . Only the modules that are being upgraded are disrupted.
D . The upgrade can be performed from the standby supervisor module.

Answer: C