$"$It$\text{'}$s strange," said Marcia.$$ "I started work at the Humane Society as a volunteer. I put in $15$ hours a week helping people adopt pets. And I loved coming to work.$$ Then, $3$ months$$ ago, they hired me$$ full$-$time at$$ $$11$ an hour.$$ I$\text{'}$m doing the same work I did before. But$$ I$\text{'}$m not finding it nearly as much$$ fun." This attitude can be attributed to which of the$$ following?

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Part $1$

A$.$John believes that complimenting employees when they perform$$ well, rather than reprimanding them for poor$$ behaviors, is the best way to manage and draw the best work from his people. Over$$ time, a problem$$ employee's performance has improved with far less instances of undesirable behavior. Based on this$$ description, it is safe to say that John is using$\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

equity theory

B$.$

$$Maslow$\text{'}$s hierarchy of needs

C$.$

operant conditioning theory

D$.$

expectancy theory

E$.$

distributive justice