What information does the help reference command provide?()

题目内容(请给出正确答案)
单选题
What information does the help reference command provide?()
A

A brief description of commands and their default values

B

The serial number and version number of the device used to open a support case with JTAC

C

A list of all the active hardware alarms on the device

D

A display of the current configuration while in operational mode

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