Answer:
the relative deprivation principle
Step-by-step explanation:
The options for this question are missing. The options are:
displacement
Parkinson's second law
the relative deprivation principle
the adaptation-level phenomenon
In psychology, the relative deprivation principle states that a person will feel deprived of something when they compare themselves to someone else. In other words, you will compare your performance and results based on other members of the group and if you are in a position where you don't have the same results of performance and they are poorer than the ones from the other people, you will feel deprived of something.
In this example, you were told you'd get a 5% raise and you were very happy until you learned that some of your coworkers earned a 10% raise and now you're not happy anymore. We can see that you are comparing yourself to the other members of your group (the other coworkers) and since you got not as good of a raise, now you're feeling unhappy. Thus this is best explained in terms of the relative deprivation principle.