Regarding the disaster tolerance of Streaming, which of the following statements is correct? (multiple choice)

Regarding the disaster tolerance of Streaming, which of the following statements is correct? (multiple choice)
A . After the Supervisor process exits, it can be automatically recognized and pulled up by Nimbus without affecting the running business.
B . Worker can be automatically pulled up by Supervisor after abnormal exit without manual intervention.
C . When a node fails, tasks on that node will be reassigned to other normal nodes without manual intervention.
D . After Nimbus fails, the standby Nimbus will automatically take over, without affecting the running business.

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Answer: ABCD