Which of these is characteristic of the online software upgrade on the Cisco ASR 5000 series?

A.
The system accepts new sessions during online upgrade.

B.
The online upgrade allows active sessions to be maintained until they are self-terminated (subscriber ends the session) or meet the optionally defined upgrade limit values.
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C.
The final step is to migrate active PSCs to standby PSCs.

D.
The online upgrade should not be performed during a plane maintenance window.