When we implement the Runnable interface, we must define the method

A. start()

B. init()

C. runnable()

D. run()

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
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  17. Frames and applets cannot be used together in the same program.
  18. Which of the following methods can be used to draw the outline of a square?
  19. Every method of a final in class is implicitly final.
  20. The concept of multiple inheritance is implemented in Java by
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