What is an event in delegation event model used by Java

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What is an event in delegation event model used by Java programming language?

1. An event is a class used for defining object, to create events
2. An event is an object that describes any change by the user and system
3. An event is an object that describes a state change in processing
4. An event is an object that describes a state change in a source
5. None of these

Correct Option: C

An event is an object that describes a state change in a source.