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Oksana_A [137]
4 years ago
9

Nicole puts a dollar into the vending machine and gets nothing back. She puts in a second dollar and still gets nothing. After h

er second attempt, she stops trying. This is and example of
Advanced Placement (AP)
2 answers:
mr_godi [17]4 years ago
6 0
Not too sure but makes the most sense out of the choices

D. Negative reinforcement
AnnyKZ [126]4 years ago
5 0
This answer is three dollars
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