Seliza doolittle says in george bernard shaw's pygmalion, "the difference between a lady and a flower girl is not how she behaves, but how she's treated." which theory of deviance also refers to this dynamic? structural strain theory conflict theory passing the self-fulfilling prophecy secondary deviance

I believe the answer is self-fulfilling prophecy
self-fulfilling prophecy refers to the prediction that we made for ourselves that indirectly making it to become true.
For example, if a student keep telling herself that 'i would definitely fail the test no matter how hard i study', she would be most likely to be discouraged to do the studying and eventually fail the test, even though she might pass if she decided to study