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30 March, 07:51

Nicole puts a dollar into the vending machine and gets nothing back. She puts in a second dollar and still gets nothing. After her second attempt, she stops trying. This is and example of

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Answers (2)
  1. 30 March, 07:58
    0
    This answer is three dollars
  2. 30 March, 09:03
    0
    Not too sure but makes the most sense out of the choices

    D. Negative reinforcement
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