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Multiple RecordListener

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Hello, everybody. I have some questions.

Which two are true about record store listeners? (Choose two.)
(A) Listeners are notified if a store is deleted.
(B) A record store can jave only one registered listener.
(C) When a record stroe is closed, listeners are removed.
(D) To listen for all events, three listeners must be registered.
(E) A record can have more than one registered listener.

The answer : C, E

This is a question about SCMAD.
I have tried to run an example.
I'm sure that a RecordStore can have more than one registered listener,
but I can't understand what case should we use more than one registered listener.

Could anyone give me an example?
Thank you!!!
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