Event handlers

Which of the following is/are true?
  1. You should write an event handler for every button
  2. You should write an event handler for every object
  3. You should write an event handler for every event that can occur
  4. You should write an event handler for every button the user can click on
  5. You should write an event handler for every method of every object
  6. You should write an event handler for every property of every object
  7. You should write an event handler for every event of every object
  8. You should write an event handler for every argument of a method
  9. None of the above since event handlers are generated automatically
  10. All events are button clicks
  11. All button clicks are events
  12. All event handlers are subprograms
  13. All events are subprograms
  14. Events are made up of statements
  15. Event handlers are made up of statements
Explain your answer.

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