DeSandra is enrolled in a Human Resource Management class at a local college. She works hard to get her assignments in on time and ensures that her term papers and presentations are error free and well rehearsed. During a class, after all students have presented their work, a student asks the professor about her grading policies for the presentations. The professor states that anyone who gave a presentation will get a grade of A$.$ DeSandra's presentation was perfect while some of her classmates clearly threw their presentation together at the last minute and stumbled through their presentations. A second presentation is due in three weeks. DeSandra decides that she will not put so much effort into her next presentation if everyone will receive the same grade. DeSandra's response is an example of:

Perceived Overreward Inequity

Equity Theory

Expectancy Theory

Goal Theory