Which of the following descriptions of Ceilometer data management is incorrect?

Which of the following descriptions of Ceilometer data management is incorrect?
A . Polling Agent will regularly and proactively obtain the required measurement data from different remote or local service entities through various APIs or other communication protocols according to the configuration.
B . The measurement data obtained by Polling Agent needs to be sent to Notification Bus, which converts them into Ceilometer samples or events.
C . Alarm Evaluator will periodically check whether the relevant alarm conditions of other warnings (Alarm) other than event types are met.
D . Alarm Notifier performs user-defined actions when the alarm conditions of the alarm are met.

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Answer: B